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setdiscovery: back out changeset 5cfdf6137af8 (issue5809) As explained in the bug report, this commit caused a performance regression. The problem occurs when the local repo has very many heads. Before 5cfdf6137af8, we used to get the remote's list of heads and if these heads mostly overlapped with the local repo's heads, we would mark these common heads as common, which would greatly reduce the size of the set of undecided nodes. Note that a similar problem existed before 5cfdf6137af8: If the local repo had very many heads and the server just had a few (or many heads from a disjoint set), we would do the same kind of slow discovery as we would with 5cfdf6137af8 in the case where local and remote repos share a large set of common nodes. For now, we just back out 5cfdf6137af8. We should improve the discovery in the "local has many heads, remote has few heads" case, but let's do that after backing this out. Differential Revision: https://phab.mercurial-scm.org/D2643
author Martin von Zweigbergk <martinvonz@google.com>
date Sun, 04 Mar 2018 07:37:08 -0800
parents 297ea0df75d0
children
line wrap: on
line source

A = 'data/abcdefghijklmnopqrstuvwxyz0123456789 !#%&\'()+,-.;=[]^`{}'
B = 'data/abcdefghijklmnopqrstuvwxyz0123456789 !#%&\'()+,-.;=[]^`{}'

uppercase char X is encoded as _x
A = 'data/ABCDEFGHIJKLMNOPQRSTUVWXYZ'
B = 'data/_a_b_c_d_e_f_g_h_i_j_k_l_m_n_o_p_q_r_s_t_u_v_w_x_y_z'

underbar is doubled
A = 'data/_'
B = 'data/__'

tilde is character-encoded
A = 'data/~'
B = 'data/~7e'

characters in ASCII code range 1..31
A = 'data/\x01\x02\x03\x04\x05\x06\x07\x08\t\n\x0b\x0c\r\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f'
B = 'data/~01~02~03~04~05~06~07~08~09~0a~0b~0c~0d~0e~0f~10~11~12~13~14~15~16~17~18~19~1a~1b~1c~1d~1e~1f'

characters in ASCII code range 126..255
A = 'data/~\x7f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f'
B = 'data/~7e~7f~80~81~82~83~84~85~86~87~88~89~8a~8b~8c~8d~8e~8f~90~91~92~93~94~95~96~97~98~99~9a~9b~9c~9d~9e~9f'

A = 'data/\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf'
B = 'data/~a0~a1~a2~a3~a4~a5~a6~a7~a8~a9~aa~ab~ac~ad~ae~af~b0~b1~b2~b3~b4~b5~b6~b7~b8~b9~ba~bb~bc~bd~be~bf'

A = 'data/\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf'
B = 'data/~c0~c1~c2~c3~c4~c5~c6~c7~c8~c9~ca~cb~cc~cd~ce~cf~d0~d1~d2~d3~d4~d5~d6~d7~d8~d9~da~db~dc~dd~de~df'

A = 'data/\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff'
B = 'data/~e0~e1~e2~e3~e4~e5~e6~e7~e8~e9~ea~eb~ec~ed~ee~ef~f0~f1~f2~f3~f4~f5~f6~f7~f8~f9~fa~fb~fc~fd~fe~ff'

Windows reserved characters
A = 'data/less <, greater >, colon :, double-quote ", backslash \\, pipe |, question-mark ?, asterisk *'
B = 'data/less ~3c, greater ~3e, colon ~3a, double-quote ~22, backslash ~5c, pipe ~7c, question-mark ~3f, asterisk ~2a'

encoding directories ending in .hg, .i or .d with '.hg' suffix
A = 'data/x.h.i/x.hg/x.i/x.d/foo'
B = 'data/x.h.i.hg/x.hg.hg/x.i.hg/x.d.hg/foo'

A = 'data/a.hg/a.i/a.d/foo'
B = 'data/a.hg.hg/a.i.hg/a.d.hg/foo'

A = 'data/au.hg/au.i/au.d/foo'
B = 'data/au.hg.hg/au.i.hg/au.d.hg/foo'

A = 'data/aux.hg/aux.i/aux.d/foo'
B = 'data/au~78.hg.hg/au~78.i.hg/au~78.d.hg/foo'

A = 'data/auxy.hg/auxy.i/auxy.d/foo'
B = 'data/auxy.hg.hg/auxy.i.hg/auxy.d.hg/foo'

but these are not encoded on *filenames*
A = 'data/foo/x.hg'
B = 'data/foo/x.hg'

A = 'data/foo/x.i'
B = 'data/foo/x.i'

A = 'data/foo/x.d'
B = 'data/foo/x.d'

A = 'data/foo/a.hg'
B = 'data/foo/a.hg'

A = 'data/foo/a.i'
B = 'data/foo/a.i'

A = 'data/foo/a.d'
B = 'data/foo/a.d'

A = 'data/foo/au.hg'
B = 'data/foo/au.hg'

A = 'data/foo/au.i'
B = 'data/foo/au.i'

A = 'data/foo/au.d'
B = 'data/foo/au.d'

A = 'data/foo/aux.hg'
B = 'data/foo/au~78.hg'

A = 'data/foo/aux.i'
B = 'data/foo/au~78.i'

A = 'data/foo/aux.d'
B = 'data/foo/au~78.d'

A = 'data/foo/auxy.hg'
B = 'data/foo/auxy.hg'

A = 'data/foo/auxy.i'
B = 'data/foo/auxy.i'

A = 'data/foo/auxy.d'
B = 'data/foo/auxy.d'

plain .hg, .i and .d directories have the leading dot encoded
A = 'data/.hg/.i/.d/foo'
B = 'data/~2ehg.hg/~2ei.hg/~2ed.hg/foo'

A = 'data/aux.bla/bla.aux/prn/PRN/lpt/com3/nul/coma/foo.NUL/normal.c.i'
B = 'data/au~78.bla/bla.aux/pr~6e/_p_r_n/lpt/co~6d3/nu~6c/coma/foo._n_u_l/normal.c.i'

A = 'data/AUX/SECOND/X.PRN/FOURTH/FI:FTH/SIXTH/SEVENTH/EIGHTH/NINETH/TENTH/ELEVENTH/LOREMIPSUM.TXT.i'
B = 'dh/au~78/second/x.prn/fourth/fi~3afth/sixth/seventh/eighth/nineth/tenth/loremia20419e358ddff1bf8751e38288aff1d7c32ec05.i'

A = 'data/enterprise/openesbaddons/contrib-imola/corba-bc/netbeansplugin/wsdlExtension/src/main/java/META-INF/services/org.netbeans.modules.xml.wsdl.bindingsupport.spi.ExtensibilityElementTemplateProvider.i'
B = 'dh/enterpri/openesba/contrib-/corba-bc/netbeans/wsdlexte/src/main/java/org.net7018f27961fdf338a598a40c4683429e7ffb9743.i'

A = 'data/AUX.THE-QUICK-BROWN-FOX-JU:MPS-OVER-THE-LAZY-DOG-THE-QUICK-BROWN-FOX-JUMPS-OVER-THE-LAZY-DOG.TXT.i'
B = 'dh/au~78.the-quick-brown-fox-ju~3amps-over-the-lazy-dog-the-quick-brown-fox-jud4dcadd033000ab2b26eb66bae1906bcb15d4a70.i'

A = 'data/Project Planning/Resources/AnotherLongDirectoryName/Followedbyanother/AndAnother/AndThenAnExtremelyLongFileName.txt'
B = 'dh/project_/resource/anotherl/followed/andanoth/andthenanextremelylongfilenaf93030515d9849cfdca52937c2204d19f83913e5.txt'

A = 'data/Project.Planning/Resources/AnotherLongDirectoryName/Followedbyanother/AndAnother/AndThenAnExtremelyLongFileName.txt'
B = 'dh/project_/resource/anotherl/followed/andanoth/andthenanextremelylongfilena0fd7c506f5c9d58204444fc67e9499006bd2d445.txt'

A = 'data/foo.../foo   / /a./_. /__/.x../    bla/.FOO/something.i'
B = 'data/foo..~2e/foo  ~20/~20/a~2e/__.~20/____/~2ex.~2e/~20   bla/~2e_f_o_o/something.i'

A = 'data/c/co/com/com0/com1/com2/com3/com4/com5/com6/com7/com8/com9'
B = 'data/c/co/com/com0/co~6d1/co~6d2/co~6d3/co~6d4/co~6d5/co~6d6/co~6d7/co~6d8/co~6d9'

A = 'data/C/CO/COM/COM0/COM1/COM2/COM3/COM4/COM5/COM6/COM7/COM8/COM9'
B = 'data/_c/_c_o/_c_o_m/_c_o_m0/_c_o_m1/_c_o_m2/_c_o_m3/_c_o_m4/_c_o_m5/_c_o_m6/_c_o_m7/_c_o_m8/_c_o_m9'

A = 'data/c.x/co.x/com.x/com0.x/com1.x/com2.x/com3.x/com4.x/com5.x/com6.x/com7.x/com8.x/com9.x'
B = 'data/c.x/co.x/com.x/com0.x/co~6d1.x/co~6d2.x/co~6d3.x/co~6d4.x/co~6d5.x/co~6d6.x/co~6d7.x/co~6d8.x/co~6d9.x'

A = 'data/x.c/x.co/x.com0/x.com1/x.com2/x.com3/x.com4/x.com5/x.com6/x.com7/x.com8/x.com9'
B = 'data/x.c/x.co/x.com0/x.com1/x.com2/x.com3/x.com4/x.com5/x.com6/x.com7/x.com8/x.com9'

A = 'data/cx/cox/comx/com0x/com1x/com2x/com3x/com4x/com5x/com6x/com7x/com8x/com9x'
B = 'data/cx/cox/comx/com0x/com1x/com2x/com3x/com4x/com5x/com6x/com7x/com8x/com9x'

A = 'data/xc/xco/xcom0/xcom1/xcom2/xcom3/xcom4/xcom5/xcom6/xcom7/xcom8/xcom9'
B = 'data/xc/xco/xcom0/xcom1/xcom2/xcom3/xcom4/xcom5/xcom6/xcom7/xcom8/xcom9'

A = 'data/l/lp/lpt/lpt0/lpt1/lpt2/lpt3/lpt4/lpt5/lpt6/lpt7/lpt8/lpt9'
B = 'data/l/lp/lpt/lpt0/lp~741/lp~742/lp~743/lp~744/lp~745/lp~746/lp~747/lp~748/lp~749'

A = 'data/L/LP/LPT/LPT0/LPT1/LPT2/LPT3/LPT4/LPT5/LPT6/LPT7/LPT8/LPT9'
B = 'data/_l/_l_p/_l_p_t/_l_p_t0/_l_p_t1/_l_p_t2/_l_p_t3/_l_p_t4/_l_p_t5/_l_p_t6/_l_p_t7/_l_p_t8/_l_p_t9'

A = 'data/l.x/lp.x/lpt.x/lpt0.x/lpt1.x/lpt2.x/lpt3.x/lpt4.x/lpt5.x/lpt6.x/lpt7.x/lpt8.x/lpt9.x'
B = 'data/l.x/lp.x/lpt.x/lpt0.x/lp~741.x/lp~742.x/lp~743.x/lp~744.x/lp~745.x/lp~746.x/lp~747.x/lp~748.x/lp~749.x'

A = 'data/x.l/x.lp/x.lpt/x.lpt0/x.lpt1/x.lpt2/x.lpt3/x.lpt4/x.lpt5/x.lpt6/x.lpt7/x.lpt8/x.lpt9'
B = 'data/x.l/x.lp/x.lpt/x.lpt0/x.lpt1/x.lpt2/x.lpt3/x.lpt4/x.lpt5/x.lpt6/x.lpt7/x.lpt8/x.lpt9'

A = 'data/lx/lpx/lptx/lpt0x/lpt1x/lpt2x/lpt3x/lpt4x/lpt5x/lpt6x/lpt7x/lpt8x/lpt9x'
B = 'data/lx/lpx/lptx/lpt0x/lpt1x/lpt2x/lpt3x/lpt4x/lpt5x/lpt6x/lpt7x/lpt8x/lpt9x'

A = 'data/xl/xlp/xlpt/xlpt0/xlpt1/xlpt2/xlpt3/xlpt4/xlpt5/xlpt6/xlpt7/xlpt8/xlpt9'
B = 'data/xl/xlp/xlpt/xlpt0/xlpt1/xlpt2/xlpt3/xlpt4/xlpt5/xlpt6/xlpt7/xlpt8/xlpt9'

A = 'data/con/p/pr/prn/a/au/aux/n/nu/nul'
B = 'data/co~6e/p/pr/pr~6e/a/au/au~78/n/nu/nu~6c'

A = 'data/CON/P/PR/PRN/A/AU/AUX/N/NU/NUL'
B = 'data/_c_o_n/_p/_p_r/_p_r_n/_a/_a_u/_a_u_x/_n/_n_u/_n_u_l'

A = 'data/con.x/p.x/pr.x/prn.x/a.x/au.x/aux.x/n.x/nu.x/nul.x'
B = 'data/co~6e.x/p.x/pr.x/pr~6e.x/a.x/au.x/au~78.x/n.x/nu.x/nu~6c.x'

A = 'data/x.con/x.p/x.pr/x.prn/x.a/x.au/x.aux/x.n/x.nu/x.nul'
B = 'data/x.con/x.p/x.pr/x.prn/x.a/x.au/x.aux/x.n/x.nu/x.nul'

A = 'data/conx/px/prx/prnx/ax/aux/auxx/nx/nux/nulx'
B = 'data/conx/px/prx/prnx/ax/au~78/auxx/nx/nux/nulx'

A = 'data/xcon/xp/xpr/xprn/xa/xau/xaux/xn/xnu/xnul'
B = 'data/xcon/xp/xpr/xprn/xa/xau/xaux/xn/xnu/xnul'

A = 'data/a./au./aux./auxy./aux.'
B = 'data/a~2e/au~2e/au~78~2e/auxy~2e/au~78~2e'

A = 'data/c./co./con./cony./con.'
B = 'data/c~2e/co~2e/co~6e~2e/cony~2e/co~6e~2e'

A = 'data/p./pr./prn./prny./prn.'
B = 'data/p~2e/pr~2e/pr~6e~2e/prny~2e/pr~6e~2e'

A = 'data/n./nu./nul./nuly./nul.'
B = 'data/n~2e/nu~2e/nu~6c~2e/nuly~2e/nu~6c~2e'

A = 'data/l./lp./lpt./lpt1./lpt1y./lpt1.'
B = 'data/l~2e/lp~2e/lpt~2e/lp~741~2e/lpt1y~2e/lp~741~2e'

A = 'data/lpt9./lpt9y./lpt9.'
B = 'data/lp~749~2e/lpt9y~2e/lp~749~2e'

A = 'data/com./com1./com1y./com1.'
B = 'data/com~2e/co~6d1~2e/com1y~2e/co~6d1~2e'

A = 'data/com9./com9y./com9.'
B = 'data/co~6d9~2e/com9y~2e/co~6d9~2e'

A = 'data/a /au /aux /auxy /aux '
B = 'data/a~20/au~20/aux~20/auxy~20/aux~20'

largest unhashed path
A = 'data/123456789-123456789-123456789-123456789-123456789-unhashed--xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'data/123456789-123456789-123456789-123456789-123456789-unhashed--xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'

shortest hashed path
A = 'data/123456789-123456789-123456789-123456789-123456789-hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/123456789-123456789-123456789-123456789-123456789-hashed----xxxxxxxxx-xxxxxxxe9c55002b50bf5181e7a6fc1f60b126e2a6fcf71'

changing one char in part that's hashed away produces a different hash
A = 'data/123456789-123456789-123456789-123456789-123456789-hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxy-123456789-123456'
B = 'dh/123456789-123456789-123456789-123456789-123456789-hashed----xxxxxxxxx-xxxxxxxd24fa4455faf8a94350c18e5eace7c2bb17af706'

uppercase hitting length limit due to encoding
A = 'data/A23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/a23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxcbbc657029b41b94ed510d05feb6716a5c03bc6b'

A = 'data/Z23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/z23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxx938f32a725c89512833fb96b6602dd9ebff51ddd'

compare with lowercase not hitting limit
A = 'data/a23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'data/a23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'

A = 'data/z23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'data/z23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'

not hitting limit with any of these
A = 'data/abcdefghijklmnopqrstuvwxyz0123456789 !#%&\'()+,-.;=[]^`{}xxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'data/abcdefghijklmnopqrstuvwxyz0123456789 !#%&\'()+,-.;=[]^`{}xxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'

underbar hitting length limit due to encoding
A = 'data/_23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/_23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxx9921a01af50feeabc060ce00eee4cba6efc31d2b'

tilde hitting length limit due to encoding
A = 'data/~23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/~7e23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxx9cec6f97d569c10995f785720044ea2e4227481b'

Windows reserved characters hitting length limit
A = 'data/<23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/~3c23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxee67d8f275876ca1ef2500fc542e63c885c4e62d'

A = 'data/>23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/~3e23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxx387a85a5b1547cc9136310c974df716818458ddb'

A = 'data/:23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/~3a23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxx2e4154fb571d13d22399c58cc4ef4858e4b75999'

A = 'data/"23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/~2223456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxfc7e3ec7b0687ee06ed8c32fef0eb0c1980259f5'

A = 'data/\\23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/~5c23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxx944e1f2b7110687e116e0d151328ac648b06ab4a'

A = 'data/|23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/~7c23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxx28b23dd3fd0242946334126ab62bcd772aac32f4'

A = 'data/?23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/~3f23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxa263022d3994d2143d98f94f431eef8b5e7e0f8a'

A = 'data/*23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/~2a23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxx0e7e6020e3c00ba7bb7893d84ca2966fbf53e140'

initial space hitting length limit
A = 'data/ 23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/~2023456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxx92acbc78ef8c0b796111629a02601f07d8aec4ea'

initial dot hitting length limit
A = 'data/.23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/~2e23456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxdbe19cc6505b3515ab9228cebf877ad07075168f'

trailing space in filename hitting length limit
A = 'data/123456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-1234 '
B = 'dh/123456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxx0025dc73e04f97426db4893e3bf67d581dc6d066'

trailing dot in filename hitting length limit
A = 'data/123456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-1234.'
B = 'dh/123456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxx85a16cf03ee7feba8a5abc626f1ba9886d01e89d'

initial space in directory hitting length limit
A = 'data/ x/456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/~20x/456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxx1b3a3b712b2ac00d6af14ae8b4c14fdbf904f516'

initial dot in directory hitting length limit
A = 'data/.x/456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/~2ex/456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxx39dbc4c193a5643a8936fc69c3363cd7ac91ab14'

trailing space in directory hitting length limit
A = 'data/x /456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/x~20/456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxx2253c341df0b5290790ad312cd8499850f2273e5'

trailing dot in directory hitting length limit
A = 'data/x./456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/x~2e/456789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxcc0324d696d34562b44b5138db08ee1594ccc583'

with directories that need direncoding, hitting length limit
A = 'data/x.i/56789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/x.i.hg/56789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxa4c4399bdf81c67dbbbb7060aa0124d8dea94f74'

A = 'data/x.d/56789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/x.d.hg/56789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxx1303fa90473b230615f5b3ea7b660e881ae5270a'

A = 'data/x.hg/5789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/x.hg.hg/5789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxx26d724a8af68e7a4e4455e6602ea9adbd0eb801f'

Windows reserved filenames, hitting length limit
A = 'data/con/56789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/co~6e/56789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxc0794d4f4c605a2617900eb2563d7113cf6ea7d3'

A = 'data/prn/56789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/pr~6e/56789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxx64db876e1a9730e27236cb9b167aff942240e932'

A = 'data/aux/56789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/au~78/56789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxx8a178558405ca6fb4bbd75446dfa186f06751a0d'

A = 'data/nul/56789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/nu~6c/56789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxc5e51b6fec1bd07bd243b053a0c3f7209855b886'

A = 'data/com1/6789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/co~6d1/6789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxx32f5f44ece3bb62b9327369ca84cc19c86259fcd'

A = 'data/com9/6789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/co~6d9/6789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxx734360b28c66a3230f55849fe8926206d229f990'

A = 'data/lpt1/6789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/lp~741/6789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxe6f16ab4b6b0637676b2842b3345c9836df46ef7'

A = 'data/lpt9/6789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'dh/lp~749/6789-123456789-123456789-123456789-123456789-xxxxxxxxx-xxxxxxxxx-xxxxxa475814c51acead3e44f2ff801f0c4903f986157'

non-reserved names, just not hitting limit
A = 'data/123456789-123456789-123456789-123456789-123456789-/com/com0/lpt/lpt0/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'
B = 'data/123456789-123456789-123456789-123456789-123456789-/com/com0/lpt/lpt0/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12345'

hashed path with largest untruncated 1st dir
A = 'data/12345678/-123456789-123456789-123456789-123456789-hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/-123456789-123456789-123456789-123456789-hashed----xxxxxxxxx-xxxxxxx4e9e9e384d00929a93b6835fbf976eb32321ff3c'

hashed path with smallest truncated 1st dir
A = 'data/123456789/123456789-123456789-123456789-123456789-hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/123456789-123456789-123456789-123456789-hashed----xxxxxxxxx-xxxxxxxx1f4e4ec5f2be76e109bfaa8e31c062fe426d5490'

hashed path with largest untruncated two dirs
A = 'data/12345678/12345678/9-123456789-123456789-123456789-hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/9-123456789-123456789-123456789-hashed----xxxxxxxxx-xxxxxxx3332d8329d969cf835542a9f2cbcfb385b6cf39d'

hashed path with smallest truncated two dirs
A = 'data/123456789/123456789/123456789-123456789-123456789-hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/123456789-123456789-123456789-hashed----xxxxxxxxx-xxxxxxxxx9699559798247dffa18717138859be5f8874840e'

hashed path with largest untruncated three dirs
A = 'data/12345678/12345678/12345678/89-123456789-123456789-hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/89-123456789-123456789-hashed----xxxxxxxxx-xxxxxxxf0a2b053bb1369cce02f78c217d6a7aaea18c439'

hashed path with smallest truncated three dirs
A = 'data/123456789/123456789/123456789/123456789-123456789-hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/123456789-123456789-hashed----xxxxxxxxx-xxxxxxxxx-1c6f8284967384ec13985a046d3553179d9d03cd'

hashed path with largest untruncated four dirs
A = 'data/12345678/12345678/12345678/12345678/789-123456789-hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/789-123456789-hashed----xxxxxxxxx-xxxxxxx0d30c99049d8f0ff97b94d4ef302027e8d54c6fd'

hashed path with smallest truncated four dirs
A = 'data/123456789/123456789/123456789/123456789/123456789-hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/123456789-hashed----xxxxxxxxx-xxxxxxxxx-x46162779e1a771810b37a737f82ae7ed33771402'

hashed path with largest untruncated five dirs
A = 'data/12345678/12345678/12345678/12345678/12345678/6789-hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/6789-hashed----xxxxxxxxx-xxxxxxxbfe752ddc8b003c2790c66a9f2eb1ea75c114390'

hashed path with smallest truncated five dirs
A = 'data/123456789/123456789/123456789/123456789/123456789/hashed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/hashed----xxxxxxxxx-xxxxxxxxx-xxb94c27b3532fa880cdd572b1c514785cab7b6ff2'

hashed path with largest untruncated six dirs
A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/ed----xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/ed----xxxxxxxxx-xxxxxxxcd8cc5483a0f3be409e0e5d4bf9e36e113c59235'

hashed path with smallest truncated six dirs
A = 'data/123456789/123456789/123456789/123456789/123456789/123456789/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/xxxxxxxxx-xxxxxxxxx-xxx47dd6f616f833a142da00701b334cebbf640da06'

hashed path with largest untruncated seven dirs
A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/xxxxxx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/xxxxxx-xxxxxxx1c8ed635229fc22efe51035feeadeb4c8a0ecb82'

hashed path with smallest truncated seven dirs
A = 'data/123456789/123456789/123456789/123456789/123456789/123456789/123456789/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/xxxxxxxxx-xxxx298ff7d33f8ce6db57930837ffea2fb2f48bb926'

hashed path with largest untruncated eight dirs
(directory 8 is dropped because it hits _maxshortdirslen)
A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345678/xxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/xxxxxxx-xxxxxxc8996ccd41b471f768057181a4d59d2febe7277d'

hashed path with smallest truncated eight dirs
(directory 8 is dropped because it hits _maxshortdirslen)
A = 'data/123456789/123456789/123456789/123456789/123456789/123456789/123456789/123456789/xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/xxxxxxxxx-xxxx4fa04a839a6bda93e1c21c713f2edcbd16e8890d'

hashed path with largest non-dropped directory 8
(just not hitting the _maxshortdirslen boundary)
A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxxx4d43d1ccaa20efbfe99ec779dc063611536ff2c5'

...adding one truncated char to dir 1..7 won't drop dir 8
A = 'data/12345678x/12345678/12345678/12345678/12345678/12345678/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/xxxxxxxx0f9efce65189cc60fd90fe4ffd49d7b58bbe0f2e'

A = 'data/12345678/12345678x/12345678/12345678/12345678/12345678/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/xxxxxxxx945ca395708cafdd54a94501859beabd3e243921'

A = 'data/12345678/12345678/12345678x/12345678/12345678/12345678/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/xxxxxxxxac62bf6898c4fd0502146074547c11caa751a327'

A = 'data/12345678/12345678/12345678/12345678x/12345678/12345678/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/xxxxxxxx2ae5a2baed7983fae8974d0ca06c6bf08b9aee92'

A = 'data/12345678/12345678/12345678/12345678/12345678x/12345678/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/xxxxxxxx214aba07b6687532a43d1e9eaf6e88cfca96b68c'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678x/12345678/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/xxxxxxxxe7a022ae82f0f55cf4e0498e55ba59ea4ebb55bf'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678x/12345/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/xxxxxxxxb51ce61164996a80f36ce3cfe64b62d519aedae3'

hashed path with shortest dropped directory 8
(just hitting the _maxshortdirslen boundary)
A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/123456/xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/xxxxxxxxx-xxxx11fa9873cc6c3215eae864528b5530a04efc6cfe'

hashed path that drops dir 8 due to dot or space at end is
encoded, and thus causing to hit _maxshortdirslen
A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/1234./-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/-xxxxxxxxx-xxx602df9b45bec564e2e1f0645d5140dddcc76ed58'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/1234 /-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/-xxxxxxxxx-xxxd99ff212bc84b4d1f70cd6b0071e3ef69d4e12ce'

... with dir 8 short enough for encoding
A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12./xx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12~2e/xx-xxxxx7baeb5ed7f14a586ee1cacecdbcbff70032d1b3c'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12 /xx-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-123456'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12~20/xx-xxxxxcf79ca9795f77d7f75745da36807e5d772bd5182'

Extensions are replicated on hashed paths. Note that
we only get to encode files that end in .i or .d inside the
store. Encoded filenames are thus bound in length.
A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.345.i'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxc10ad03b5755ed524f5286aab1815dfe07729438.i'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.345.d'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxx9eec83381f2b39ef5ac8b4ecdf2c94f7983f57c8.d'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3456.i'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxb7796dc7d175cfb0bb8a7728f58f6ebec9042568.i'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.34567.i'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxb515857a6bfeef017c4894d8df42458ac65d55b8.i'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.345678.i'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxb05a0f247bc0a776211cd6a32ab714fd9cc09f2b.i'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3456789.i'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxf192b48bff08d9e0e12035fb52bc58c70de72c94.i'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3456789-.i'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxx435551e0ed4c7b083b9ba83cee916670e02e80ad.i'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3456789-1.i'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxa7f74eb98d8d58b716356dfd26e2f9aaa65d6a9a.i'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3456789-12.i'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxed68d9bd43b931f0b100267fee488d65a0c66f62.i'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3456789-123.i'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxx5cea44de2b642d2ba2b4a30693ffb1049644d698.i'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3456789-1234.i'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxx68462f62a7f230b39c1b5400d73ec35920990b7e.i'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3456789-12345.i'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxx4cb852a314c6da240a83eec94761cdd71c6ec22e.i'

A = 'data/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxxxxxx-xxxxxxxxx-xxxxxxxxx-123456789-12.3456789-12345-ABCDEFGHIJKLMNOPRSTUVWXYZ-abcdefghjiklmnopqrstuvwxyz-ABCDEFGHIJKLMNOPRSTUVWXYZ-1234567890-xxxxxxxxx-xxxxxxxxx-xxxxxxxx-xxxxxxxxx-wwwwwwwww-wwwwwwwww-wwwwwwwww-wwwwwwwww-wwwwwwwww-wwwwwwwww-wwwwwwwww-wwwwwwwww-wwwwwwwww.i'
B = 'dh/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345/-xxxxx93352aa50377751d9e5ebdf52da1e6e69a6887a6.i'

paths outside data/ can be encoded
A = 'metadata/dir/00manifest.i'
B = 'metadata/dir/00manifest.i'

A = 'metadata/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345678/12345678/00manifest.i'
B = 'dh/ata/12345678/12345678/12345678/12345678/12345678/12345678/12345678/00manife0a4da1f89aa2aa9eb0896eb451288419049781b4.i'