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Handle cases when backup worker pulling may miss mutations #11908

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merged 8 commits into from
Feb 18, 2025
Merged

Handle cases when backup worker pulling may miss mutations #11908

merged 8 commits into from
Feb 18, 2025
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@jzhou77 jzhou77 commented Jan 24, 2025 •
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When TLog replies with a popped version, it means the peek request is missing mutations from the peek's begin version to the popped version. This was not handled in backup worker previously. (#10990 has a different fix of removing the noop mode.)

This PR addresses this by checking if the missing versions are caused by NOOP mode pops. This can only happen when the worker requests mutations in the previous epoch. If so, the worker reads the max popped version due to noop mode, which should be >= tlog reply's popped version. If not, an assertion is triggered, because mutations are missing.

In the NOOP mode, we save the popped version in the system key space "backupWorkerMaxNoopVersionKey". The transaction that saves noop version can cause QuietDatabase workload failure, so I disabled it before the consistency check.

100k BackupCorrectnessPartitioned.toml 20250210-050111-jzhou-37ef394139f3b154
100k regular correctness 20250217-175836-jzhou-bd7a8310904ebc19 , 20250207-033912-jzhou-e83d1a7d767205be

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jzhou77 commented Feb 11, 2025

CI failure is TraceTooManyLines error fixed in #11935

neethuhaneesha
neethuhaneesha previously approved these changes Feb 14, 2025
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fdbserver/BackupWorker.actor.cpp Outdated
try {
tr.setOption(FDBTransactionOptions::ACCESS_SYSTEM_KEYS);
tr.setOption(FDBTransactionOptions::PRIORITY_SYSTEM_IMMEDIATE);
tr.setOption(FDBTransactionOptions::LOCK_AWARE);
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Is doing READ_LOCK_AWARE and READ_SYSTEM_KEYS better here?

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done.

fdbserver/BackupWorker.actor.cpp Outdated Show resolved Hide resolved
@jzhou77
Handle cases when backup worker pulling may miss mutations
6a07744 
I.e., throw an error to trigger a recovery.
@jzhou77
Fix start version after backup worker exits noop mode
d9f04dc
@jzhou77
Save NOOP progress of backup workers
1bd6f0a 
This is needed so that CC knows the lower bound of versions that can be included
in a backup.
@jzhou77
Pause backup workers during quite database
a5d2a58 
Because in NOOP mode, backup workers still writes to the database, and cause
non-empty storage queues.
@jzhou77
It's fine to ignore mutations if noop mode popped them
048374a
@jzhou77
Delay updating pop version in noop mode until it's saved
4196864 
Otherwise, the pop version can become larger than the actual saved version when
switching to the regular pulling mode. Because the pop version is larger,
mutations larger than saved version could be popped and no long available.
@jzhou77
Fix start version for pullAsyncData
4939cd8
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Result of foundationdb-pr-clang-arm on Linux CentOS 7

  • Commit ID: 9c8e826
  • Duration 0:08:46
  • Result: ❌ FAILED
  • Error: reference not found for primary source and source version 9c8e82693dca60034c983a784e6e9c7cf157e99e
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Result of foundationdb-pr-clang on Linux CentOS 7

  • Commit ID: 9c8e826
  • Duration 0:09:30
  • Result: ❌ FAILED
  • Error: reference not found for primary source and source version 9c8e82693dca60034c983a784e6e9c7cf157e99e
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Result of foundationdb-pr-cluster-tests on Linux CentOS 7

  • Commit ID: 9c8e826
  • Duration 0:09:42
  • Result: ❌ FAILED
  • Error: reference not found for primary source and source version 9c8e82693dca60034c983a784e6e9c7cf157e99e
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Result of foundationdb-pr on Linux CentOS 7

  • Commit ID: 9c8e826
  • Duration 0:09:39
  • Result: ❌ FAILED
  • Error: reference not found for primary source and source version 9c8e82693dca60034c983a784e6e9c7cf157e99e
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Result of foundationdb-pr-clang-ide on Linux CentOS 7

  • Commit ID: 9c8e826
  • Duration 0:11:18
  • Result: ❌ FAILED
  • Error: reference not found for primary source and source version 9c8e82693dca60034c983a784e6e9c7cf157e99e
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Result of foundationdb-pr-macos-m1 on macOS Ventura 13.x

  • Commit ID: 9c8e826
  • Duration 0:13:00
  • Result: ❌ FAILED
  • Error: reference not found for primary source and source version 9c8e82693dca60034c983a784e6e9c7cf157e99e
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Result of foundationdb-pr-macos on macOS Ventura 13.x

  • Commit ID: 9c8e826
  • Duration 0:13:31
  • Result: ❌ FAILED
  • Error: reference not found for primary source and source version 9c8e82693dca60034c983a784e6e9c7cf157e99e
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Result of foundationdb-pr-clang-ide on Linux CentOS 7

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Result of foundationdb-pr-cluster-tests on Linux CentOS 7

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Result of foundationdb-pr-clang on Linux CentOS 7

  • Commit ID: 1690af5
  • Duration 1:02:12
  • Result: ❌ FAILED
  • Error: Error while executing command: if python3 -m joshua.joshua list --stopped | grep ${ENSEMBLE_ID} | grep -q 'pass=10[0-9][0-9][0-9]'; then echo PASS; else echo FAIL && exit 1; fi. Reason: exit status 1
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Result of foundationdb-pr on Linux CentOS 7

  • Commit ID: 1690af5
  • Duration 1:05:56
  • Result: ❌ FAILED
  • Error: Error while executing command: if python3 -m joshua.joshua list --stopped | grep ${ENSEMBLE_ID} | grep -q 'pass=10[0-9][0-9][0-9]'; then echo PASS; else echo FAIL && exit 1; fi. Reason: exit status 1
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jzhou77 commented Feb 18, 2025

CI failures are unrelated to this change.

@jzhou77 jzhou77 merged commit 63c6539 into apple:main Feb 18, 2025
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