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etherpad-lite
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checkAllPads: Increase performance/resilience 

Performance: Don't preload pads. Check for pool only once per pad.
Resilience: Handle missing revision.
This commit is contained in:
Claas Augner 2018-03-09 14:02:22 +01:00 committed by GitHub
parent 5c864ec47d
commit 5c915062e1
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1 changed files with 79 additions and 72 deletions
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151
bin/checkAllPads.js
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@ -1,5 +1,5 @@
/*
This is a debug tool. It checks all revisions of all pads for data corruption
This is a debug tool. It checks all revisions for data corruption
*/
if(process.argv.length != 2)
@ -35,96 +35,103 @@ async.series([
padManager.listAllPads(function(err, res)
{
var padIds = res.padIDs;
pads = [];
async.forEach(padIds, function(padId, callback) {
padManager.getPad(padId, function(err, pad) {
pads.push(pad);
callback(err);
})
}, callback);
padIds = res.padIDs;
callback(err);
});
},
function (callback)
{
async.forEach(pads, function(pad, callback)
async.forEach(padIds, function(padId, callback)
{
//create an array with key kevisions
//key revisions always save the full pad atext
var head = pad.getHeadRevisionNumber();
var keyRevisions = [];
for(var i=0;i<head;i+=100)
{
keyRevisions.push(i);
}
//run trough all key revisions
async.forEachSeries(keyRevisions, function(keyRev, callback)
{
//create an array of revisions we need till the next keyRevision or the End
var revisionsNeeded = [];
for(var i=keyRev;i<=keyRev+100 && i<=head; i++)
padManager.getPad(padId, function(err, pad) {
if (err) {
callback(err);
}
//check if the pad has a pool
if(pad.pool === undefined )
{
revisionsNeeded.push(i);
console.error("[" + pad.id + "] Missing attribute pool");
callback();
return;
}
//create an array with key kevisions
//key revisions always save the full pad atext
var head = pad.getHeadRevisionNumber();
var keyRevisions = [];
for(var i=0;i<head;i+=100)
{
keyRevisions.push(i);
}
//this array will hold all revision changesets
var revisions = [];
//run trough all needed revisions and get them from the database
async.forEach(revisionsNeeded, function(revNum, callback)
//run trough all key revisions
async.forEachSeries(keyRevisions, function(keyRev, callback)
{
db.db.get("pad:"+pad.id+":revs:" + revNum, function(err, revision)
//create an array of revisions we need till the next keyRevision or the End
var revisionsNeeded = [];
for(var i=keyRev;i<=keyRev+100 && i<=head; i++)
{
revisions[revNum] = revision;
callback(err);
});
}, function(err)
{
if(err)
{
callback(err);
return;
revisionsNeeded.push(i);
}
//check if the pad has a pool
if(pad.pool === undefined )
{
console.error("[" + pad.id + "] Attribute pool is missing");
callback();
return;
}
//this array will hold all revision changesets
var revisions = [];
//check if there is a atext in the keyRevisions
if(revisions[keyRev] == null || revisions[keyRev].meta === undefined || revisions[keyRev].meta.atext === undefined)
//run trough all needed revisions and get them from the database
async.forEach(revisionsNeeded, function(revNum, callback)
{
console.error("[" + pad.id + "] No atext in key revision " + keyRev);
callback();
return;
}
var apool = pad.pool;
var atext = revisions[keyRev].meta.atext;
for(var i=keyRev+1;i<=keyRev+100 && i<=head; i++)
{
try
db.db.get("pad:"+pad.id+":revs:" + revNum, function(err, revision)
{
//console.log("check revision " + i);
var cs = revisions[i].changeset;
atext = Changeset.applyToAText(cs, atext, apool);
revisions[revNum] = revision;
callback(err);
});
}, function(err)
{
if(err)
{
callback(err);
return;
}
catch(e)
{
console.error("[" + pad.id + "] Bad changeset at revision " + i + " - " + e.message);
//check if the revision exists
if (revisions[keyRev] == null) {
console.error("[" + pad.id + "] Missing revision " + keyRev);
callback();
return;
}
}
callback();
});
}, callback);
//check if there is a atext in the keyRevisions
if(revisions[keyRev].meta === undefined || revisions[keyRev].meta.atext === undefined)
{
console.error("[" + pad.id + "] Missing atext in revision " + keyRev);
callback();
return;
}
var apool = pad.pool;
var atext = revisions[keyRev].meta.atext;
for(var i=keyRev+1;i<=keyRev+100 && i<=head; i++)
{
try
{
//console.log("[" + pad.id + "] check revision " + i);
var cs = revisions[i].changeset;
atext = Changeset.applyToAText(cs, atext, apool);
}
catch(e)
{
console.error("[" + pad.id + "] Bad changeset at revision " + i + " - " + e.message);
callback();
return;
}
}
callback();
});
}, callback);
});
}, callback);
}
], function (err)