- 21 Mar, 2023 2 commits
-
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
- 17 Mar, 2023 1 commit
-
-
Vitaly Arbuzov authored
-
- 14 Mar, 2023 2 commits
-
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
- 10 Mar, 2023 2 commits
-
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
- 08 Mar, 2023 26 commits
-
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
Add assertion that command slot is correct after command execution, and make scripts that access multiple slots work correctly
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
Add comment Populate current dictionary in the right place
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
* updated comments and formatting
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
Improve incremental rehashing by using a linked list instead of linear scan when finding rehash target
-
Vitaly Arbuzov authored
-
Vitaly Arbuzov authored
-
- 23 Feb, 2023 1 commit
-
-
Chen Tianjie authored
When no-touch mode is enabled, the client will not touch LRU/LFU of the keys it accesses, except when executing command `TOUCH`. This allows inspecting or modifying the key-space without affecting their eviction. Changes: - A command `CLIENT NO-TOUCH ON|OFF` to switch on and off this mode. - A client flag `#define CLIENT_NOTOUCH (1ULL<<45)`, which can be shown with `CLIENT INFO`, by the letter "T" in the "flags" field. - Clear `NO-TOUCH` flag in `clearClientConnectionState`, which is used by `RESET` command and resetting temp clients used by modules. - Also clear `NO-EVICT` flag in `clearClientConnectionState`, this might have been an oversight, spotted by @madolson. - A test using `DEBUG OBJECT` command to verify that LRU stat is not touched when no-touch mode is on. Co-authored-by:
chentianjie <chentianjie@alibaba-inc.com> Co-authored-by:
Madelyn Olson <34459052+madolson@users.noreply.github.com> Co-authored-by:
sundb <sundbcn@gmail.com>
-
- 14 Feb, 2023 1 commit
-
-
guybe7 authored
Starting from Redis 7.0 (#9890) we started wrapping everything a command propagates with MULTI/EXEC. The problem is that both SCAN and RANDOMKEY can lazy-expire arbitrary keys (similar behavior to active-expire), and put DELs in a transaction. Fix: When these commands are called without a parent exec-unit (e.g. not in EVAL or MULTI) we avoid wrapping their DELs in a transaction (for the same reasons active-expire and eviction avoids a transaction) This PR adds a per-command flag that indicates that the command may touch arbitrary keys (not the ones in the arguments), and uses that flag to avoid the MULTI-EXEC. For now, this flag is internal, since we're considering other solutions for the future. Note for cluster mode: if SCAN/RANDOMKEY is inside EVAL/MULTI it can still cause the same situation (as it always did), but it won't cause a CROSSSLOT because replicas and AOF do not perform slot checks. The problem with the above is mainly for 3rd party ecosystem tools that propagate commands from master to master, or feed an AOF file with redis-cli into a master. This PR aims to fix the regression in redis 7.0, and we opened #11792 to try to handle the bigger problem with lazy expire better for another release.
-
- 12 Feb, 2023 1 commit
-
-
Tian authored
# Background The RDB file is usually generated and used once and seldom used again, but the content would reside in page cache until OS evicts it. A potential problem is that once the free memory exhausts, the OS have to reclaim some memory from page cache or swap anonymous page out, which may result in a jitters to the Redis service. Supposing an exact scenario, a high-capacity machine hosts many redis instances, and we're upgrading the Redis together. The page cache in host machine increases as RDBs are generated. Once the free memory drop into low watermark(which is more likely to happen in older Linux kernel like 3.10, before [watermark_scale_factor](https://lore.kernel.org/lkml/1455813719-2395-1-git-send-email-hannes@cmpxchg.org/) is introduced, the `low watermark` is linear to `min watermark`, and there'is not too much buffer space for `kswapd` to be wake up to reclaim memory), a `direct reclaim` happens, which means the process would stall to wait for memory allocation. # What the PR does The PR introduces a capability to reclaim the cache when the RDB is operated. Generally there're two cases, read and write the RDB. For read it's a little messy to address the incremental reclaim, so the reclaim is done in one go in background after the load is finished to avoid blocking the work thread. For write, incremental reclaim amortizes the work of reclaim so no need to put it into background, and the peak watermark of cache can be reduced in this way. Two cases are addresses specially, replication and restart, for both of which the cache is leveraged to speed up the processing, so the reclaim is postponed to a right time. To do this, a flag is added to`rdbSave` and `rdbLoad` to control whether the cache need to be kept, with the default value false. # Something deserve noting 1. Though `posix_fadvise` is the POSIX standard, but only few platform support it, e.g. Linux, FreeBSD 10.0. 2. In Linux `posix_fadvise` only take effect on writeback-ed pages, so a `sync`(or `fsync`, `fdatasync`) is needed to flush the dirty page before `posix_fadvise` if we reclaim write cache. # About test A unit test is added to verify the effect of `posix_fadvise`. In integration test overall cache increase is checked, as well as the cache backed by RDB as a specific TCL test is executed in isolated Github action job.
-
- 30 Jan, 2023 1 commit
-
-
Qu Chen authored
Redis 7.0 introduced new logic in expireIfNeeded() where a read-only replica would never consider a key as expired when replicating commands from the master. See acf3495e. This was done by checking server.current_client with server.master. However, we should instead check for CLIENT_MASTER flag for this logic to be more robust and consistent with the rest of the Redis code base.
-
- 16 Jan, 2023 1 commit
-
-
Oran Agra authored
Related to the hang reported in #11671 Currently, redis can disconnect a client due to reaching output buffer limit, it'll also avoid feeding that output buffer with more data, but it will keep running the loop in the command (despite the client already being marked for disconnection) This PR is an attempt to mitigate the problem, specifically for commands that are easy to abuse, specifically: KEYS, HRANDFIELD, SRANDMEMBER, ZRANDMEMBER. The RAND family of commands can take a negative COUNT argument (which is not bound to the number of elements in the key), so it's enough to create a key with one field, and then these commands can be used to hang redis. For KEYS the caller can use the existing keyspace in redis (if big enough).
-
- 11 Jan, 2023 2 commits
-
-
Viktor Söderqvist authored
This change deletes the dictGetNext and dictGetNextRef functions, so the dict API doesn't expose the next field at all. The bucket function in dictScan is deleted. A separate dictScanDefrag function is added which takes a defrag alloc function to defrag-reallocate the dict entries. "Dirty" code accessing the dict internals in active defrag is removed. An 'afterReplaceEntry' is added to dictType, which allows the dict user to keep the dictEntry metadata up to date after reallocation/defrag/move. Additionally, for updating the cluster slot-to-key mapping, after a dictEntry has been reallocated, we need to know which db a dict belongs to, so we store a pointer to the db in a new metadata section in the dict struct, which is a new mechanism similar to dictEntry metadata. This adds some complexity but provides better isolation.
-
Viktor Söderqvist authored
Use functions for all accesses to dictEntry (except in dict.c). Dict abuses e.g. in defrag.c have been replaced by support functions provided by dict.
-