author | Gregory Szorc <gregory.szorc@gmail.com> |
Sun, 18 Dec 2016 16:59:04 -0800 | |
changeset 30777 | 7de7afd8bdd9 |
parent 30776 | 3997edc4a86d |
child 30779 | 38aa1ca97b6a |
permissions | -rw-r--r-- |
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$ cat >> $HGRCPATH << EOF |
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> [extensions] |
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> share = |
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> EOF |
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store and revlogv1 are required in source |
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$ hg --config format.usestore=false init no-store |
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$ hg -R no-store debugupgraderepo |
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abort: cannot upgrade repository; requirement missing: store |
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[255] |
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$ hg init no-revlogv1 |
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$ cat > no-revlogv1/.hg/requires << EOF |
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> dotencode |
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> fncache |
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> generaldelta |
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> store |
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> EOF |
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$ hg -R no-revlogv1 debugupgraderepo |
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abort: cannot upgrade repository; requirement missing: revlogv1 |
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[255] |
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Cannot upgrade shared repositories |
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$ hg init share-parent |
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$ hg -q share share-parent share-child |
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$ hg -R share-child debugupgraderepo |
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abort: cannot upgrade repository; unsupported source requirement: shared |
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[255] |
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Do not yet support upgrading manifestv2 and treemanifest repos |
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$ hg --config experimental.manifestv2=true init manifestv2 |
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$ hg -R manifestv2 debugupgraderepo |
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abort: cannot upgrade repository; unsupported source requirement: manifestv2 |
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[255] |
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$ hg --config experimental.treemanifest=true init treemanifest |
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$ hg -R treemanifest debugupgraderepo |
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abort: cannot upgrade repository; unsupported source requirement: treemanifest |
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[255] |
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Cannot add manifestv2 or treemanifest requirement during upgrade |
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$ hg init disallowaddedreq |
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$ hg -R disallowaddedreq --config experimental.manifestv2=true --config experimental.treemanifest=true debugupgraderepo |
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abort: cannot upgrade repository; do not support adding requirement: manifestv2, treemanifest |
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[255] |
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An upgrade of a repository created with recommended settings only suggests optimizations |
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$ hg init empty |
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$ cd empty |
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$ hg debugupgraderepo |
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(no feature deficiencies found in existing repository) |
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performing an upgrade with "--run" will make the following changes: |
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requirements |
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preserved: dotencode, fncache, generaldelta, revlogv1, store |
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additional optimizations are available by specifying "--optimize <name>": |
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redeltaparent |
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deltas within internal storage will be recalculated to choose an optimal base revision where this was not already done; the size of the repository may shrink and various operations may become faster; the first time this optimization is performed could slow down upgrade execution considerably; subsequent invocations should not run noticeably slower |
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redeltamultibase |
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deltas within internal storage will be recalculated against multiple base revision and the smallest difference will be used; the size of the repository may shrink significantly when there are many merges; this optimization will slow down execution in proportion to the number of merges in the repository and the amount of files in the repository; this slow down should not be significant unless there are tens of thousands of files and thousands of merges |
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redeltaall |
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deltas within internal storage will always be recalculated without reusing prior deltas; this will likely make execution run several times slower; this optimization is typically not needed |
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--optimize can be used to add optimizations |
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$ hg debugupgrade --optimize redeltaparent |
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(no feature deficiencies found in existing repository) |
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performing an upgrade with "--run" will make the following changes: |
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requirements |
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preserved: dotencode, fncache, generaldelta, revlogv1, store |
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redeltaparent |
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deltas within internal storage will choose a new base revision if needed |
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additional optimizations are available by specifying "--optimize <name>": |
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redeltamultibase |
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deltas within internal storage will be recalculated against multiple base revision and the smallest difference will be used; the size of the repository may shrink significantly when there are many merges; this optimization will slow down execution in proportion to the number of merges in the repository and the amount of files in the repository; this slow down should not be significant unless there are tens of thousands of files and thousands of merges |
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redeltaall |
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deltas within internal storage will always be recalculated without reusing prior deltas; this will likely make execution run several times slower; this optimization is typically not needed |
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Various sub-optimal detections work |
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$ cat > .hg/requires << EOF |
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> revlogv1 |
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> store |
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> EOF |
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$ hg debugupgraderepo |
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repository lacks features recommended by current config options: |
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fncache |
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long and reserved filenames may not work correctly; repository performance is sub-optimal |
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dotencode |
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storage of filenames beginning with a period or space may not work correctly |
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generaldelta |
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deltas within internal storage are unable to choose optimal revisions; repository is larger and slower than it could be; interaction with other repositories may require extra network and CPU resources, making "hg push" and "hg pull" slower |
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116 |
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117 |
performing an upgrade with "--run" will make the following changes: |
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118 |
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119 |
requirements |
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120 |
preserved: revlogv1, store |
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121 |
added: dotencode, fncache, generaldelta |
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122 |
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123 |
fncache |
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124 |
repository will be more resilient to storing certain paths and performance of certain operations should be improved |
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125 |
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126 |
dotencode |
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127 |
repository will be better able to store files beginning with a space or period |
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128 |
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129 |
generaldelta |
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130 |
repository storage will be able to create optimal deltas; new repository data will be smaller and read times should decrease; interacting with other repositories using this storage model should require less network and CPU resources, making "hg push" and "hg pull" faster |
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131 |
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132 |
additional optimizations are available by specifying "--optimize <name>": |
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133 |
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redeltaparent |
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135 |
deltas within internal storage will be recalculated to choose an optimal base revision where this was not already done; the size of the repository may shrink and various operations may become faster; the first time this optimization is performed could slow down upgrade execution considerably; subsequent invocations should not run noticeably slower |
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136 |
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137 |
redeltamultibase |
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138 |
deltas within internal storage will be recalculated against multiple base revision and the smallest difference will be used; the size of the repository may shrink significantly when there are many merges; this optimization will slow down execution in proportion to the number of merges in the repository and the amount of files in the repository; this slow down should not be significant unless there are tens of thousands of files and thousands of merges |
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139 |
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140 |
redeltaall |
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deltas within internal storage will always be recalculated without reusing prior deltas; this will likely make execution run several times slower; this optimization is typically not needed |
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142 |
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143 |
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144 |
$ hg --config format.dotencode=false debugupgraderepo |
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145 |
repository lacks features recommended by current config options: |
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146 |
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147 |
fncache |
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148 |
long and reserved filenames may not work correctly; repository performance is sub-optimal |
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149 |
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150 |
generaldelta |
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151 |
deltas within internal storage are unable to choose optimal revisions; repository is larger and slower than it could be; interaction with other repositories may require extra network and CPU resources, making "hg push" and "hg pull" slower |
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152 |
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153 |
repository lacks features used by the default config options: |
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154 |
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155 |
dotencode |
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156 |
storage of filenames beginning with a period or space may not work correctly |
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157 |
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158 |
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159 |
performing an upgrade with "--run" will make the following changes: |
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160 |
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161 |
requirements |
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162 |
preserved: revlogv1, store |
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163 |
added: fncache, generaldelta |
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164 |
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165 |
fncache |
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166 |
repository will be more resilient to storing certain paths and performance of certain operations should be improved |
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167 |
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168 |
generaldelta |
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169 |
repository storage will be able to create optimal deltas; new repository data will be smaller and read times should decrease; interacting with other repositories using this storage model should require less network and CPU resources, making "hg push" and "hg pull" faster |
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170 |
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171 |
additional optimizations are available by specifying "--optimize <name>": |
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172 |
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173 |
redeltaparent |
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174 |
deltas within internal storage will be recalculated to choose an optimal base revision where this was not already done; the size of the repository may shrink and various operations may become faster; the first time this optimization is performed could slow down upgrade execution considerably; subsequent invocations should not run noticeably slower |
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175 |
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176 |
redeltamultibase |
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177 |
deltas within internal storage will be recalculated against multiple base revision and the smallest difference will be used; the size of the repository may shrink significantly when there are many merges; this optimization will slow down execution in proportion to the number of merges in the repository and the amount of files in the repository; this slow down should not be significant unless there are tens of thousands of files and thousands of merges |
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178 |
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179 |
redeltaall |
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180 |
deltas within internal storage will always be recalculated without reusing prior deltas; this will likely make execution run several times slower; this optimization is typically not needed |
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181 |
|
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182 |
|
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183 |
$ cd .. |
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184 |
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185 |
Upgrading a repository that is already modern essentially no-ops |
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186 |
|
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187 |
$ hg init modern |
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188 |
$ hg -R modern debugupgraderepo --run |
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189 |
upgrade will perform the following actions: |
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190 |
|
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191 |
requirements |
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192 |
preserved: dotencode, fncache, generaldelta, revlogv1, store |
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193 |
|
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194 |
beginning upgrade... |
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195 |
repository locked and read-only |
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196 |
creating temporary repository to stage migrated data: $TESTTMP/modern/.hg/upgrade.* (glob) |
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197 |
marking source repository as being upgraded; clients will be unable to read from repository |
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198 |
starting in-place swap of repository data |
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199 |
replaced files will be backed up at $TESTTMP/modern/.hg/upgradebackup.* (glob) |
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200 |
finalizing requirements file and making repository readable again |
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201 |
removing temporary repository $TESTTMP/modern/.hg/upgrade.* (glob) |
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202 |
copy of old repository backed up at $TESTTMP/modern/.hg/upgradebackup.* (glob) |
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203 |
the old repository will not be deleted; remove it to free up disk space once the upgraded repository is verified |
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204 |
|
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205 |
Upgrading a repository to generaldelta works |
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206 |
|
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207 |
$ hg --config format.usegeneraldelta=false init upgradegd |
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208 |
$ cd upgradegd |
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209 |
$ touch f0 |
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210 |
$ hg -q commit -A -m initial |
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211 |
$ touch f1 |
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212 |
$ hg -q commit -A -m 'add f1' |
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213 |
$ hg -q up -r 0 |
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214 |
$ touch f2 |
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215 |
$ hg -q commit -A -m 'add f2' |
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216 |
|
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217 |
$ hg debugupgraderepo --run |
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218 |
upgrade will perform the following actions: |
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219 |
|
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220 |
requirements |
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221 |
preserved: dotencode, fncache, revlogv1, store |
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222 |
added: generaldelta |
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223 |
|
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224 |
generaldelta |
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225 |
repository storage will be able to create optimal deltas; new repository data will be smaller and read times should decrease; interacting with other repositories using this storage model should require less network and CPU resources, making "hg push" and "hg pull" faster |
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226 |
|
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227 |
beginning upgrade... |
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parents:
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228 |
repository locked and read-only |
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229 |
creating temporary repository to stage migrated data: $TESTTMP/upgradegd/.hg/upgrade.* (glob) |
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parents:
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230 |
marking source repository as being upgraded; clients will be unable to read from repository |
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parents:
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231 |
starting in-place swap of repository data |
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parents:
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232 |
replaced files will be backed up at $TESTTMP/upgradegd/.hg/upgradebackup.* (glob) |
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parents:
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233 |
finalizing requirements file and making repository readable again |
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parents:
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234 |
removing temporary repository $TESTTMP/upgradegd/.hg/upgrade.* (glob) |
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repair: begin implementation of in-place upgrading
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parents:
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235 |
copy of old repository backed up at $TESTTMP/upgradegd/.hg/upgradebackup.* (glob) |
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parents:
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236 |
the old repository will not be deleted; remove it to free up disk space once the upgraded repository is verified |
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parents:
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237 |
|
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parents:
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238 |
Original requirements backed up |
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parents:
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239 |
|
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parents:
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240 |
$ cat .hg/upgradebackup.*/requires |
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parents:
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241 |
dotencode |
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242 |
fncache |
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parents:
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243 |
revlogv1 |
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244 |
store |
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parents:
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245 |
|
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parents:
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246 |
generaldelta added to original requirements files |
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247 |
|
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parents:
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248 |
$ cat .hg/requires |
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parents:
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249 |
dotencode |
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parents:
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250 |
fncache |
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parents:
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251 |
generaldelta |
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parents:
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252 |
revlogv1 |
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253 |
store |
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254 |
|
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255 |
$ cd .. |