- 14 Mar, 2023 1 commit
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Slava Koyfman authored
Implementing the WAITAOF functionality which would allow the user to block until a specified number of Redises have fsynced all previous write commands to the AOF. Syntax: `WAITAOF <num_local> <num_replicas> <timeout>` Response: Array containing two elements: num_local, num_replicas num_local is always either 0 or 1 representing the local AOF on the master. num_replicas is the number of replicas that acknowledged the a replication offset of the last write being fsynced to the AOF. Returns an error when called on replicas, or when called with non-zero num_local on a master with AOF disabled, in all other cases the response just contains number of fsync copies. Main changes: * Added code to keep track of replication offsets that are confirmed to have been fsynced to disk. * Keep advancing master_repl_offset even when replication is disabled (and there's no replication backlog, only if there's an AOF enabled). This way we can use this command and it's mechanisms even when replication is disabled. * Extend REPLCONF ACK to `REPLCONF ACK <ofs> FACK <ofs>`, the FACK will be appended only if there's an AOF on the replica, and already ignored on old masters (thus backwards compatible) * WAIT now no longer wait for the replication offset after your last command, but rather the replication offset after your last write (or read command that caused propagation, e.g. lazy expiry). Unrelated changes: * WAIT command respects CLIENT_DENY_BLOCKING (not just CLIENT_MULTI) Implementation details: * Add an atomic var named `fsynced_reploff_pending` that's updated (usually by the bio thread) and later copied to the main `fsynced_reploff` variable (only if the AOF base file exists). I.e. during the initial AOF rewrite it will not be used as the fsynced offset since the AOF base is still missing. * Replace close+fsync bio job with new BIO_CLOSE_AOF (AOF specific) job that will also update fsync offset the field. * Handle all AOF jobs (BIO_CLOSE_AOF, BIO_AOF_FSYNC) in the same bio worker thread, to impose ordering on their execution. This solves a race condition where a job could set `fsynced_reploff_pending` to a higher value than another pending fsync job, resulting in indicating an offset for which parts of the data have not yet actually been fsynced. Imposing an ordering on the jobs guarantees that fsync jobs are executed in increasing order of replication offset. * Drain bio jobs when switching `appendfsync` to "always" This should prevent a write race between updates to `fsynced_reploff_pending` in the main thread (`flushAppendOnlyFile` when set to ALWAYS fsync), and those done in the bio thread. * Drain the pending fsync when starting over a new AOF to avoid race conditions with the previous AOF offsets overriding the new one (e.g. after switching to replicate from a new master). * Make sure to update the fsynced offset at the end of the initial AOF rewrite. a must in case there are no additional writes that trigger a periodic fsync, specifically for a replica that does a full sync. Limitations: It is possible to write a module and a Lua script that propagate to the AOF and doesn't propagate to the replication stream. see REDISMODULE_ARGV_NO_REPLICAS and luaRedisSetReplCommand. These features are incompatible with the WAITAOF command, and can result in two bad cases. The scenario is that the user executes command that only propagates to AOF, and then immediately issues a WAITAOF, and there's no further writes on the replication stream after that. 1. if the the last thing that happened on the replication stream is a PING (which increased the replication offset but won't trigger an fsync on the replica), then the client would hang forever (will wait for an fack that the replica will never send sine it doesn't trigger any fsyncs). 2. if the last thing that happened is a write command that got propagated properly, then WAITAOF will be released immediately, without waiting for an fsync (since the offset didn't change) Refactoring: * Plumbing to allow bio worker to handle multiple job types This introduces infrastructure necessary to allow BIO workers to not have a 1-1 mapping of worker to job-type. This allows in the future to assign multiple job types to a single worker, either as a performance/resource optimization, or as a way of enforcing ordering between specific classes of jobs. Co-authored-by:
Oran Agra <oran@redislabs.com>
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- 06 Oct, 2022 1 commit
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Moti Cohen authored
Refine getTimeoutFromObjectOrReply() out-of-range check. Timeout is parsed (and verifies out of range) as double and multiplied by 1000, added mstime() and stored in long-long which might lead to out-of-range value of long-long. Co-authored-by:
moticless <moticless@github.com> Co-authored-by:
Oran Agra <oran@redislabs.com> Co-authored-by:
Ozan Tezcan <ozantezcan@gmail.com>
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- 09 Jun, 2021 1 commit
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Yossi Gottlieb authored
This commit revives the improves the ability to run the test suite against external servers, instead of launching and managing `redis-server` processes as part of the test fixture. This capability existed in the past, using the `--host` and `--port` options. However, it was quite limited and mostly useful when running a specific tests. Attempting to run larger chunks of the test suite experienced many issues: * Many tests depend on being able to start and control `redis-server` themselves, and there's no clear distinction between external server compatible and other tests. * Cluster mode is not supported (resulting with `CROSSSLOT` errors). This PR cleans up many things and makes it possible to run the entire test suite against an external server. It also provides more fine grained controls to handle cases where the external server supports a subset of the Redis commands, limited number of databases, cluster mode, etc. The tests directory now contains a `README.md` file that describes how this works. This commit also includes additional cleanups and fixes: * Tests can now be tagged. * Tag-based selection is now unified across `start_server`, `tags` and `test`. * More information is provided about skipped or ignored tests. * Repeated patterns in tests have been extracted to common procedures, both at a global level and on a per-test file basis. * Cleaned up some cases where test setup was based on a previous test executing (a major anti-pattern that repeats itself in many places). * Cleaned up some cases where test teardown was not part of a test (in the future we should have dedicated teardown code that executes even when tests fail). * Fixed some tests that were flaky running on external servers.
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- 17 Jan, 2021 1 commit
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Yossi Gottlieb authored
This adds basic coverage to IO threads by running the cluster and few selected Redis test suite tests with the IO threads enabled. Also provides some necessary additional improvements to the test suite: * Add --config to sentinel/cluster tests for arbitrary configuration. * Fix --tags whitelisting which was broken. * Add a `network` tag to some tests that are more network intensive. This is work in progress and more tests should be properly tagged in the future.
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- 12 Jan, 2021 1 commit
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Madelyn Olson authored
This fixes three issues: 1. Using debug SLEEP was impacting the subsequent test, and causing it to pass reliably even though it should have failed. There was exactly 5 seconds of artificial pause (after 1000, wait 3000, wait 1000) between the debug sleep 5 and when we needed to unblock the client in the subsequent test. Now the test properly makes sure the client is unblocked, and the subsequent test is fixed. 2. Minor, the client pause types were using & comparisons instead of ==, since it was previously a flag. 3. Test is faster now that some of the hand wavy time is removed.
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- 08 Jan, 2021 1 commit
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Madelyn Olson authored
Implementation of client pause WRITE and client unpause
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- 23 Aug, 2020 1 commit
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Yossi Gottlieb authored
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- 07 Oct, 2019 1 commit
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Yossi Gottlieb authored
* Introduce a connection abstraction layer for all socket operations and integrate it across the code base. * Provide an optional TLS connections implementation based on OpenSSL. * Pull a newer version of hiredis with TLS support. * Tests, redis-cli updates for TLS support.
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- 18 Nov, 2016 1 commit
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antirez authored
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