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Created new block ID allocator & put it into use. #68

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merged 2 commits into from
Sep 18, 2014

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spencerkimball
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Created ID allocator which intelligently allocates blocks of IDs
and refreshes them automatically at the halfway-through point.

Moved Store to use new ID allocators for Raft IDs and Range IDs.
Split up Store.CreateRange into methods for getting a BootstrapRangeMetadata
and creating a RangeMetadata using a replicas slice and range key intervals
which allocates IDs and populates the metadata as necessary. This will be
used from the range split code.

Created ID allocator which intelligently allocates blocks of IDs
and refreshes them automatically at the halfway-through point.

Moved Store to use new ID allocators for Raft IDs and Range IDs.
Split up Store.CreateRange into methods for getting a BootstrapRangeMetadata
and creating a RangeMetadata using a replicas slice and range key intervals
which allocates IDs and populates the metadata as necessary. This will be
used from the range split code.
@spencerkimball
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@tschottdorf @cockroachdb/developers

@@ -224,10 +221,12 @@ var (
// KeyConfigZonePrefix specifies the key prefix for zone
// configurations. The suffix is the affected key prefix.
KeyConfigZonePrefix = MakeKey(KeySystemPrefix, Key("zone"))
// KeyNodeIDGenerator contains a sequence generator for node IDs.
// KeyNodeIDGenerator is the globl node ID generator sequence.
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s/globl/global/

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Fixed.

@bdarnell
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LGTM

@spencerkimball spencerkimball force-pushed the spencerkimball/address-bens-comments branch from b93b31d to 478c6c2 Compare September 18, 2014 17:21
spencerkimball added a commit that referenced this pull request Sep 18, 2014
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Created new block ID allocator & put it into use.
@spencerkimball spencerkimball merged commit 7861260 into master Sep 18, 2014
@spencerkimball spencerkimball deleted the spencerkimball/address-bens-comments branch September 18, 2014 17:29
tbg referenced this pull request in tbg/cockroach Aug 31, 2016
We have been seeing long startup times which disappear spontaneously. During a
restart of the beta cluster, the following goroutine was observed, which suggests
that we were spending a lot of time GCing replicas on startup.

    engine              ??:0                     _Cfunc_DBIterNext(cockroachdb#324, cockroachdb#323, 0, 0, 0, 0, 0, 0, 0)
    engine              rocksdb.go:1135          (*rocksDBIterator).Next(cockroachdb#235)
    storage             replica_data_iter.go:104 (*ReplicaDataIterator).Next(cockroachdb#316)
    storage             store.go:1748            (*Store).destroyReplicaData(#109, cockroachdb#317, 0, 0)
    storage             store.go:841             (*Store).Start.func2(0x101b, cockroachdb#300, 0x36, 0x40, cockroachdb#301, 0x36, 0x40, cockroachdb#315, 0x3, 0x4, ...)
    storage             store.go:734             IterateRangeDescriptors.func1(cockroachdb#306, 0x40, 0x41, cockroachdb#307, 0x92, 0x92, cockroachdb#341, 0, 0x186c, 0x4000, ...)
    engine              mvcc.go:1593             MVCCIterate(cockroachdb#329, #68, #47, #81, cockroachdb#232, 0x9, 0x10, cockroachdb#233, 0xb, 0x10, ...)
    storage             store.go:738             IterateRangeDescriptors(cockroachdb#330, cockroachdb#196, #47, #81, cockroachdb#195, #179, #110)
    storage             store.go:867             (*Store).Start(#109, cockroachdb#330, cockroachdb#196, #179, cockroachdb#185, 0x1)
    server              node.go:405              (*Node).initStores(#78, cockroachdb#330, cockroachdb#196, #98, 0x1, 0x1, #179, 0, #55)
    server              node.go:330              (*Node).start(#78, cockroachdb#330, cockroachdb#196, #42, #129, #98, 0x1, 0x1, 0, 0, ...)
    server              server.go:431            (*Server).Start(#5, cockroachdb#330, cockroachdb#196, #95, 0x1)
    cli                 start.go:368             runStart(#34, #178, 0, 0x9, 0, 0)
    cobra               command.go:599           (*Command).execute(#34, #177, 0x9, 0x9, #34, #177)
    cobra               command.go:689           (*Command).ExecuteC(#33, #70, cockroachdb#343, #72)
    cobra               command.go:648           (*Command).Execute(#33, #71, cockroachdb#343)
    cli                 cli.go:96                Run(#64, 0xa, 0xa, 0, 0)
    main                main.go:37               main()
tbg referenced this pull request in tbg/cockroach Aug 31, 2016
We have been seeing long startup times which disappear spontaneously. During a
restart of the beta cluster, the following goroutine was observed, which suggests
that we were spending a lot of time GCing replicas on startup.

    engine              ??:0                     _Cfunc_DBIterNext(cockroachdb#324, cockroachdb#323, 0, 0, 0, 0, 0, 0, 0)
    engine              rocksdb.go:1135          (*rocksDBIterator).Next(cockroachdb#235)
    storage             replica_data_iter.go:104 (*ReplicaDataIterator).Next(cockroachdb#316)
    storage             store.go:1748            (*Store).destroyReplicaData(#109, cockroachdb#317, 0, 0)
    storage             store.go:841             (*Store).Start.func2(0x101b, cockroachdb#300, 0x36, 0x40, cockroachdb#301, 0x36, 0x40, cockroachdb#315, 0x3, 0x4, ...)
    storage             store.go:734             IterateRangeDescriptors.func1(cockroachdb#306, 0x40, 0x41, cockroachdb#307, 0x92, 0x92, cockroachdb#341, 0, 0x186c, 0x4000, ...)
    engine              mvcc.go:1593             MVCCIterate(cockroachdb#329, #68, #47, #81, cockroachdb#232, 0x9, 0x10, cockroachdb#233, 0xb, 0x10, ...)
    storage             store.go:738             IterateRangeDescriptors(cockroachdb#330, cockroachdb#196, #47, #81, cockroachdb#195, #179, #110)
    storage             store.go:867             (*Store).Start(#109, cockroachdb#330, cockroachdb#196, #179, cockroachdb#185, 0x1)
    server              node.go:405              (*Node).initStores(#78, cockroachdb#330, cockroachdb#196, #98, 0x1, 0x1, #179, 0, #55)
    server              node.go:330              (*Node).start(#78, cockroachdb#330, cockroachdb#196, #42, #129, #98, 0x1, 0x1, 0, 0, ...)
    server              server.go:431            (*Server).Start(#5, cockroachdb#330, cockroachdb#196, #95, 0x1)
    cli                 start.go:368             runStart(#34, #178, 0, 0x9, 0, 0)
    cobra               command.go:599           (*Command).execute(#34, #177, 0x9, 0x9, #34, #177)
    cobra               command.go:689           (*Command).ExecuteC(#33, #70, cockroachdb#343, #72)
    cobra               command.go:648           (*Command).Execute(#33, #71, cockroachdb#343)
    cli                 cli.go:96                Run(#64, 0xa, 0xa, 0, 0)
    main                main.go:37               main()
soniabhishek pushed a commit to soniabhishek/cockroach that referenced this pull request Feb 15, 2017
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2 participants