move archive deletion out of the main eviction script
This commit is contained in:
ansuz
parent
3e4895220c
commit
9e1d82f373
176
lib/eviction.js
176
lib/eviction.js
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@ -30,8 +30,16 @@ Env = {
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*/
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module.exports = function (Env, cb) {
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var complete = Util.once(Util.mkAsync(cb));
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// the number of ms artificially introduced between CPU-intensive operations
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var THROTTLE_FACTOR = 10;
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var evictArchived = function (Env, cb) {
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var Log;
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var store;
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var pinStore;
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var blobs;
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var retentionTime = +new Date() - (Env.archiveRetentionTime * 24 * 3600 * 1000);
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var report = {
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// archivedChannelsRemoved,
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// archivedAccountsRemoved,
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@ -53,67 +61,7 @@ module.exports = function (Env, cb) {
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// runningTime,
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};
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// the administrator should have set an 'inactiveTime' in their config
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// if they didn't, just exit.
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if (!Env.inactiveTime || typeof(Env.inactiveTime) !== "number") {
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return void complete("NO_INACTIVE_TIME");
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}
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// get a list of premium accounts on this instance
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// pre-converted to the 'safeKey' format so we can easily compare
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// them against ids we see on the filesystem
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var premiumSafeKeys = Object.keys(Env.limits || {})
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.map(function (id) {
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return Keys.canonicalize(id);
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})
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.filter(Boolean)
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.map(Util.escapeKeyCharacters);
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// files which have not been changed since before this date can be considered inactive
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var inactiveTime = +new Date() - (Env.inactiveTime * 24 * 3600 * 1000);
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// files which were archived before this date can be considered safe to remove
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var retentionTime = +new Date() - (Env.archiveRetentionTime * 24 * 3600 * 1000);
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var store;
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var pinStore;
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var Log;
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var blobs;
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/* It's fairly easy to know if a channel or blob is active
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but knowing whether it is pinned requires that we
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keep the set of pinned documents in memory.
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Some users will share the same set of documents in their pin lists,
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so the representation of pinned documents should scale sub-linearly
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with the number of users and pinned documents.
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That said, sub-linear isn't great...
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A Bloom filter is "a space-efficient probabilistic data structure"
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which lets us check whether an item is _probably_ or _definitely not_
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in a set. This is good enough for our purposes since we just want to
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know whether something can safely be removed and false negatives
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(not safe to remove when it actually is) are acceptable.
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We set our capacity to some large number, and the error rate to whatever
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we think is acceptable.
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TODO make this configurable ?
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*/
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var BLOOM_CAPACITY = (1 << 20) - 1; // over a million items
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var BLOOM_ERROR = 1 / 10000; // an error rate of one in a thousand
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// the number of ms artificially introduced between CPU-intensive operations
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var THROTTLE_FACTOR = 10;
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// we'll use one filter for the set of active documents
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var activeDocs = Bloom.optimalFilter(BLOOM_CAPACITY, BLOOM_ERROR);
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// and another one for the set of pinned documents
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var pinnedDocs = Bloom. optimalFilter(BLOOM_CAPACITY, BLOOM_ERROR);
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var startTime = +new Date();
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var msSinceStart = function () {
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return (+new Date()) - startTime;
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};
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var loadStorage = function () {
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store = Env.store;
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@ -237,6 +185,105 @@ module.exports = function (Env, cb) {
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}));
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};
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nThen(loadStorage)
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.nThen(removeArchivedChannels)
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.nThen(removeArchivedBlobProofs)
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.nThen(removeArchivedBlobs)
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.nThen(function () {
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cb();
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});
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};
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module.exports = function (Env, cb) {
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var complete = Util.once(Util.mkAsync(cb));
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var report = {
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// archivedChannelsRemoved,
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// archivedAccountsRemoved,
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// archivedBlobProofsRemoved,
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// archivedBlobsRemoved,
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// totalChannels,
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// activeChannels,
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// totalBlobs,
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// activeBlobs,
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// totalAccounts,
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// activeAccounts,
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// channelsArchived,
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launchTime: +new Date(),
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// runningTime,
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};
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// the administrator should have set an 'inactiveTime' in their config
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// if they didn't, just exit.
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if (!Env.inactiveTime || typeof(Env.inactiveTime) !== "number") {
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return void complete("NO_INACTIVE_TIME");
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}
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// get a list of premium accounts on this instance
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// pre-converted to the 'safeKey' format so we can easily compare
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// them against ids we see on the filesystem
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var premiumSafeKeys = Object.keys(Env.limits || {})
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.map(function (id) {
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return Keys.canonicalize(id);
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})
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.filter(Boolean)
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.map(Util.escapeKeyCharacters);
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// files which have not been changed since before this date can be considered inactive
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var inactiveTime = +new Date() - (Env.inactiveTime * 24 * 3600 * 1000);
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// files which were archived before this date can be considered safe to remove
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var retentionTime = +new Date() - (Env.archiveRetentionTime * 24 * 3600 * 1000);
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var store;
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var pinStore;
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var Log;
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var blobs;
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/* It's fairly easy to know if a channel or blob is active
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but knowing whether it is pinned requires that we
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keep the set of pinned documents in memory.
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Some users will share the same set of documents in their pin lists,
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so the representation of pinned documents should scale sub-linearly
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with the number of users and pinned documents.
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That said, sub-linear isn't great...
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A Bloom filter is "a space-efficient probabilistic data structure"
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which lets us check whether an item is _probably_ or _definitely not_
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in a set. This is good enough for our purposes since we just want to
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know whether something can safely be removed and false negatives
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(not safe to remove when it actually is) are acceptable.
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We set our capacity to some large number, and the error rate to whatever
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we think is acceptable.
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TODO make this configurable ?
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*/
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var BLOOM_CAPACITY = (1 << 20) - 1; // over a million items
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var BLOOM_ERROR = 1 / 10000; // an error rate of one in a thousand
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// we'll use one filter for the set of active documents
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var activeDocs = Bloom.optimalFilter(BLOOM_CAPACITY, BLOOM_ERROR);
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// and another one for the set of pinned documents
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var pinnedDocs = Bloom. optimalFilter(BLOOM_CAPACITY, BLOOM_ERROR);
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var startTime = +new Date();
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var msSinceStart = function () {
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return (+new Date()) - startTime;
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};
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var loadStorage = function () {
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store = Env.store;
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pinStore = Env.pinStore;
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Log = Env.Log;
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blobs = Env.blobStore;
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};
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var categorizeChannelsByActivity = function (w) {
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var channels = 0;
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var active = 0;
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@ -566,9 +613,6 @@ module.exports = function (Env, cb) {
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};
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nThen(loadStorage)
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.nThen(removeArchivedChannels)
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.nThen(removeArchivedBlobProofs)
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.nThen(removeArchivedBlobs)
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// iterate over all documents and add them to a bloom filter if they have been active
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.nThen(categorizeChannelsByActivity)
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@ -590,3 +634,5 @@ module.exports = function (Env, cb) {
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complete(void 0, report);
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});
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};
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module.exports.archived = evictArchived;
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@ -0,0 +1,102 @@
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var Eviction = require("../lib/eviction");
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var nThen = require("nthen");
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var Store = require("../lib/storage/file");
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var BlobStore = require("../lib/storage/blob");
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var Quota = require("../lib/commands/quota");
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var Environment = require("../lib/env");
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var Decrees = require("../lib/decrees");
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var config = require("../lib/load-config");
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var Env = Environment.create(config);
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var loadPremiumAccounts = function (Env, cb) {
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nThen(function (w) {
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// load premium accounts
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Quota.updateCachedLimits(Env, w(function (err) {
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if (err) {
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Env.Log.error('EVICT_LOAD_PREMIUM_ACCOUNTS', {
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error: err,
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});
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}
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}));
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}).nThen(function (w) {
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// load and apply decrees
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Decrees.load(Env, w(function (err) {
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if (err) {
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Env.Log.error('EVICT_LOAD_DECREES', {
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error: err.code || err,
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message: err.message,
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});
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}
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}));
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}).nThen(function () {
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//console.log(Env.limits);
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cb();
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});
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};
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var prepareEnv = function (Env, cb) {
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//Quota.applyCustomLimits(Env);
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nThen(function (w) {
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/* Database adaptors
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*/
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// load the store which will be used for iterating over channels
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// and performing operations like archival and deletion
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Store.create(config, w(function (err, _) {
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if (err) {
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w.abort();
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throw err;
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}
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Env.store = _;
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}));
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Store.create({
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filePath: config.pinPath,
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}, w(function (err, _) {
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if (err) {
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w.abort();
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throw err;
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}
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Env.pinStore = _;
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}));
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// load the logging module so that you have a record of which
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// files were archived or deleted at what time
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var Logger = require("../lib/log");
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Logger.create(config, w(function (_) {
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Env.Log = _;
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}));
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config.getSession = function () {};
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BlobStore.create(config, w(function (err, _) {
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if (err) {
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w.abort();
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return console.error(err);
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}
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Env.blobStore = _;
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}));
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}).nThen(function (w) {
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loadPremiumAccounts(Env, w(function (/* err */) {
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//if (err) { }
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}));
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}).nThen(function () {
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cb();
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});
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};
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//console.log("starting");
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nThen(function (w) {
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// load database adaptors and configuration values into the environment
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prepareEnv(Env, w(function () {
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//console.log("env prepared");
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}));
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}).nThen(function (w) {
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Eviction.archived(Env, w(function () {
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}));
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});
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