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feat(tiering): simple offload loop #2987

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merged 4 commits into from
May 6, 2024

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dranikpg
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@dranikpg dranikpg commented May 1, 2024

Simplest offloading loop, once memory budget was exceed it kicks in

@dranikpg dranikpg force-pushed the tiering-offload branch 5 times, most recently from 882dd1e to b2021be Compare May 6, 2024 08:04
@dranikpg dranikpg changed the title WIP: Tiering simple offload loop feat(tiering): simple offload loop May 6, 2024
@dranikpg dranikpg marked this pull request as ready for review May 6, 2024 13:49
@dranikpg dranikpg requested a review from romange May 6, 2024 13:49
@@ -2083,9 +2083,13 @@ void ServerFamily::Info(CmdArgList args, ConnectionContext* cntx) {
}

if (should_enter("TIERED", true)) {
append("tiered_entries_cnt", total.tiered_entries);
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"tiered_entries" for consistency with other metrics here

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We should have some guidelines for naming, I use _cnt below as well

src/server/server_family.cc Outdated Show resolved Hide resolved
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Nice. I do not remember what was decided about the offloading policy. @adiholden
I remember discussing it, do we have it in the design document?

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dranikpg commented May 6, 2024

I do not remember what was decided about the offloading policy

Currently I just copied what the old tiering code was doing more or less

@dranikpg dranikpg merged commit f27506e into dragonflydb:main May 6, 2024
7 checks passed
@dranikpg dranikpg deleted the tiering-offload branch May 7, 2024 07:32
kireque pushed a commit to kireque/home-ops that referenced this pull request May 10, 2024
…nfly ( v1.17.1 → v1.18.0 ) (#539)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[docker.dragonflydb.io/dragonflydb/dragonfly](https://togithub.com/dragonflydb/dragonfly)
| minor | `v1.17.1` -> `v1.18.0` |

---

### Release Notes

<details>
<summary>dragonflydb/dragonfly
(docker.dragonflydb.io/dragonflydb/dragonfly)</summary>

###
[`v1.18.0`](https://togithub.com/dragonflydb/dragonfly/releases/tag/v1.18.0)

[Compare
Source](https://togithub.com/dragonflydb/dragonfly/compare/v1.17.1...v1.18.0)

##### Dragonfly v1.18.0

Some prominent changes include:

- ACL improvements:
[#&#8203;2945](https://togithub.com/dragonflydb/dragonfly/issues/2945)
[#&#8203;2943](https://togithub.com/dragonflydb/dragonfly/issues/2943)
[#&#8203;2920](https://togithub.com/dragonflydb/dragonfly/issues/2920)
[#&#8203;2982](https://togithub.com/dragonflydb/dragonfly/issues/2982)
[#&#8203;2995](https://togithub.com/dragonflydb/dragonfly/issues/2995)
- Implementation of json.merge
[#&#8203;2960](https://togithub.com/dragonflydb/dragonfly/issues/2960)
-   Replication - memory improvements
- Very much alpha support for data tiering. Try it out with
`--tiered_prefix=/pathto/ssd/base` and see how your memory usage goes
down (STRING type only). Do not use it in prod! 😸

##### What's Changed

- feat: retry ACK if the configs are different
[#&#8203;2833](https://togithub.com/dragonflydb/dragonfly/issues/2833)
by [@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#2906
- chore(tiering): Update Get, Set, Del by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2897
- chore: preparation step for lock fingerprints by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2899
- fix(transaction): Use FinishHop in schedule by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2911
- chore(tiering): Fix MacOs build by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2913
- feat(cluster): Migration cancellation support by
[@&#8203;chakaz](https://togithub.com/chakaz) in
[dragonflydb/dragonfly#2869
- feat: process migration data after FIN opcode
[#&#8203;2864](https://togithub.com/dragonflydb/dragonfly/issues/2864)
by [@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#2918
- chore(string_family): Refactor SetCmd by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2919
- fix: Improve reply latency of HELLO by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2925
- chore: improve reply latency of SendScoredArray by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2929
- Namespace support in prometheus rule by
[@&#8203;Pothulapati](https://togithub.com/Pothulapati) in
[dragonflydb/dragonfly#2931
- fix: socket closed when RegisterOnErrorCb is called in HandleRequests
by [@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2932
- chore: bring more clarity when replayer fails by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2933
- Slot migration cancel crash fix by
[@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#2934
- feat: add ability reaply config with migration
[#&#8203;2924](https://togithub.com/dragonflydb/dragonfly/issues/2924)
by [@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#2926
- fix(test): Unflake fuzzy cluster migration test by
[@&#8203;chakaz](https://togithub.com/chakaz) in
[dragonflydb/dragonfly#2927
- chore: Remove Schedule() call by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2938
- chore: get rid of lock keys by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2894
- fix: introduce info_replication_valkey_compatible flag by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2936
- feat(metrics): adding max_clients to metrics and info output
([#&#8203;2912](https://togithub.com/dragonflydb/dragonfly/issues/2912))
by [@&#8203;racamirko](https://togithub.com/racamirko) in
[dragonflydb/dragonfly#2940
- chore: adjust transaction code to keystep/3 commands by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2941
- feat(tiering): Get, GetSet, Set test by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2921
- chore(acl): adjust some ACL command responses by
[@&#8203;Niennienzz](https://togithub.com/Niennienzz) in
[dragonflydb/dragonfly#2943
- chore: Pull helio with new future by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2944
- refactor: add cluster namespace by
[@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#2948
- chore: Introduce ShardArgs as a distinct type by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2952
- chore: Log db_index in traffic logger by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2951
- fixes for v1.18.0 by
[@&#8203;adiholden](https://togithub.com/adiholden) in
[dragonflydb/dragonfly#2956
- feat(tiering): Support append (and modifications in general) by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2949
- feat: extended bracket index in jsonpath by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2954
- chore: Remove TieringV1 by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2962
- fix(pytests): replace proc.wait() with proc.communicate() to avoid
deadlocks by [@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2964
- feat(tiering): Registered buffers by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2967
- feat: add slot migration error processing by
[@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#2957
- chore(acl): allow multiple users in acl deluser by
[@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2945
- feat: implement json.merge by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2960
- fix: fix deadlock and slot flush for migration cancel
[#&#8203;2968](https://togithub.com/dragonflydb/dragonfly/issues/2968)
by [@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#2972
- chore(tiering): Lots of metrics by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2977
- fix: crash during migration when connection is closing by
[@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2973
- fix: remove acl-check and cancel instead when REPLCONF ACK fails to
validate by [@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2920
- fix: check return code of process after communicate by
[@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2976
- fix: allow non hashed passwords when loading users from acl file by
[@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2982
- chore: update our container distributions versions by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2983
- chore: remove version checks when running our regtests by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2988
- chore(acl): add vlog and check on deluser flow by
[@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2995
- fix(memcached): Register memcached listener to handle `--maxclients`
by [@&#8203;chakaz](https://togithub.com/chakaz) in
[dragonflydb/dragonfly#2985
- chore: another preparation commit to get rid of kv_args in transaction
by [@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2996
- chore: improve performance of Scan operation by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2990
- fix(server): small string allocations only under 256 bytes str by
[@&#8203;adiholden](https://togithub.com/adiholden) in
[dragonflydb/dragonfly#2991
- fix(cluster-migration): Support cancelling migration right after
starting it by [@&#8203;chakaz](https://togithub.com/chakaz) in
[dragonflydb/dragonfly#2992
- chore: fix double header issue by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#3002
- chore: small tiering fixes by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2966
- feat(benchmark-tests): run in K8s by
[@&#8203;zacharya19](https://togithub.com/zacharya19) in
[dragonflydb/dragonfly#2965
- Benchmark fixes by
[@&#8203;zacharya19](https://togithub.com/zacharya19) in
[dragonflydb/dragonfly#3005
- fix(tiering): rename v2 + max_file_size by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#3004
- chore: fix tiering macos stub by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#3006
- chore: export listener stats by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#3007
- chore: pull latest helio by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#3009
- fix(server): lag is 0 when server not in stable state by
[@&#8203;adiholden](https://togithub.com/adiholden) in
[dragonflydb/dragonfly#3010
- chore: get rid of kv_args and replace it with slices to full_args by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2942
- fix(server): non auto journal write after callback finish by
[@&#8203;adiholden](https://togithub.com/adiholden) in
[dragonflydb/dragonfly#3016
- fix(server): shrink replication steaming buf by
[@&#8203;adiholden](https://togithub.com/adiholden) in
[dragonflydb/dragonfly#3012
- fix(zset): fix random in ZRANDMEMBER command by
[@&#8203;BagritsevichStepan](https://togithub.com/BagritsevichStepan) in
[dragonflydb/dragonfly#2994
- Fix benchmark by [@&#8203;adiholden](https://togithub.com/adiholden)
in
[dragonflydb/dragonfly#3017
- chore: Remove tiering test skip by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#3011
- feat(tiering): simple offload loop by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2987
- feat(tiering): MGET support by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#3013
- Revert "chore: get rid of kv_args and replace it with slices to
full\_… by [@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#3024
- chore(dash): Replace comparator with predicate by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#3025
- feat: add defragment command by
[@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#3003

##### Huge thanks to all the contributors! ❤️

##### New Contributors

- [@&#8203;racamirko](https://togithub.com/racamirko) made their first
contribution in
[dragonflydb/dragonfly#2940
- [@&#8203;BagritsevichStepan](https://togithub.com/BagritsevichStepan)
made their first contribution in
[dragonflydb/dragonfly#2994

**Full Changelog**:
dragonflydb/dragonfly@v1.17.0...v1.18.0

</details>

---

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Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the
rebase/retry checkbox.

🔕 **Ignore**: Close this PR and you won't be reminded about these
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---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
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<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNy4zNTIuMCIsInVwZGF0ZWRJblZlciI6IjM3LjM1Mi4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6WyJyZW5vdmF0ZS9jb250YWluZXIiLCJ0eXBlL21pbm9yIl19-->

Co-authored-by: kireque-bot[bot] <143391978+kireque-bot[bot]@users.noreply.github.com>
lumiere-bot bot added a commit to coolguy1771/home-ops that referenced this pull request May 11, 2024
…18.0 ) (#4656)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
|
[ghcr.io/dragonflydb/dragonfly](https://togithub.com/dragonflydb/dragonfly)
| minor | `v1.17.1` -> `v1.18.0` |

---

> [!WARNING]
> Some dependencies could not be looked up. Check the Dependency
Dashboard for more information.

---

### Release Notes

<details>
<summary>dragonflydb/dragonfly (ghcr.io/dragonflydb/dragonfly)</summary>

###
[`v1.18.0`](https://togithub.com/dragonflydb/dragonfly/releases/tag/v1.18.0)

[Compare
Source](https://togithub.com/dragonflydb/dragonfly/compare/v1.17.1...v1.18.0)

##### Dragonfly v1.18.0

Some prominent changes include:

- ACL improvements:
[#&#8203;2945](https://togithub.com/dragonflydb/dragonfly/issues/2945)
[#&#8203;2943](https://togithub.com/dragonflydb/dragonfly/issues/2943)
[#&#8203;2920](https://togithub.com/dragonflydb/dragonfly/issues/2920)
[#&#8203;2982](https://togithub.com/dragonflydb/dragonfly/issues/2982)
[#&#8203;2995](https://togithub.com/dragonflydb/dragonfly/issues/2995)
- Implementation of json.merge
[#&#8203;2960](https://togithub.com/dragonflydb/dragonfly/issues/2960)
-   Replication - memory improvements
- Very much alpha support for data tiering. Try it out with
`--tiered_prefix=/pathto/ssd/base` and see how your memory usage goes
down (STRING type only). Do not use it in prod! 😸

##### What's Changed

- feat: retry ACK if the configs are different
[#&#8203;2833](https://togithub.com/dragonflydb/dragonfly/issues/2833)
by [@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#2906
- chore(tiering): Update Get, Set, Del by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2897
- chore: preparation step for lock fingerprints by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2899
- fix(transaction): Use FinishHop in schedule by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2911
- chore(tiering): Fix MacOs build by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2913
- feat(cluster): Migration cancellation support by
[@&#8203;chakaz](https://togithub.com/chakaz) in
[dragonflydb/dragonfly#2869
- feat: process migration data after FIN opcode
[#&#8203;2864](https://togithub.com/dragonflydb/dragonfly/issues/2864)
by [@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#2918
- chore(string_family): Refactor SetCmd by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2919
- fix: Improve reply latency of HELLO by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2925
- chore: improve reply latency of SendScoredArray by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2929
- Namespace support in prometheus rule by
[@&#8203;Pothulapati](https://togithub.com/Pothulapati) in
[dragonflydb/dragonfly#2931
- fix: socket closed when RegisterOnErrorCb is called in HandleRequests
by [@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2932
- chore: bring more clarity when replayer fails by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2933
- Slot migration cancel crash fix by
[@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#2934
- feat: add ability reaply config with migration
[#&#8203;2924](https://togithub.com/dragonflydb/dragonfly/issues/2924)
by [@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#2926
- fix(test): Unflake fuzzy cluster migration test by
[@&#8203;chakaz](https://togithub.com/chakaz) in
[dragonflydb/dragonfly#2927
- chore: Remove Schedule() call by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2938
- chore: get rid of lock keys by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2894
- fix: introduce info_replication_valkey_compatible flag by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2936
- feat(metrics): adding max_clients to metrics and info output
([#&#8203;2912](https://togithub.com/dragonflydb/dragonfly/issues/2912))
by [@&#8203;racamirko](https://togithub.com/racamirko) in
[dragonflydb/dragonfly#2940
- chore: adjust transaction code to keystep/3 commands by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2941
- feat(tiering): Get, GetSet, Set test by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2921
- chore(acl): adjust some ACL command responses by
[@&#8203;Niennienzz](https://togithub.com/Niennienzz) in
[dragonflydb/dragonfly#2943
- chore: Pull helio with new future by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2944
- refactor: add cluster namespace by
[@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#2948
- chore: Introduce ShardArgs as a distinct type by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2952
- chore: Log db_index in traffic logger by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2951
- fixes for v1.18.0 by
[@&#8203;adiholden](https://togithub.com/adiholden) in
[dragonflydb/dragonfly#2956
- feat(tiering): Support append (and modifications in general) by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2949
- feat: extended bracket index in jsonpath by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2954
- chore: Remove TieringV1 by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2962
- fix(pytests): replace proc.wait() with proc.communicate() to avoid
deadlocks by [@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2964
- feat(tiering): Registered buffers by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2967
- feat: add slot migration error processing by
[@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#2957
- chore(acl): allow multiple users in acl deluser by
[@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2945
- feat: implement json.merge by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2960
- fix: fix deadlock and slot flush for migration cancel
[#&#8203;2968](https://togithub.com/dragonflydb/dragonfly/issues/2968)
by [@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#2972
- chore(tiering): Lots of metrics by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2977
- fix: crash during migration when connection is closing by
[@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2973
- fix: remove acl-check and cancel instead when REPLCONF ACK fails to
validate by [@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2920
- fix: check return code of process after communicate by
[@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2976
- fix: allow non hashed passwords when loading users from acl file by
[@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2982
- chore: update our container distributions versions by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2983
- chore: remove version checks when running our regtests by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2988
- chore(acl): add vlog and check on deluser flow by
[@&#8203;kostasrim](https://togithub.com/kostasrim) in
[dragonflydb/dragonfly#2995
- fix(memcached): Register memcached listener to handle `--maxclients`
by [@&#8203;chakaz](https://togithub.com/chakaz) in
[dragonflydb/dragonfly#2985
- chore: another preparation commit to get rid of kv_args in transaction
by [@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2996
- chore: improve performance of Scan operation by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2990
- fix(server): small string allocations only under 256 bytes str by
[@&#8203;adiholden](https://togithub.com/adiholden) in
[dragonflydb/dragonfly#2991
- fix(cluster-migration): Support cancelling migration right after
starting it by [@&#8203;chakaz](https://togithub.com/chakaz) in
[dragonflydb/dragonfly#2992
- chore: fix double header issue by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#3002
- chore: small tiering fixes by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2966
- feat(benchmark-tests): run in K8s by
[@&#8203;zacharya19](https://togithub.com/zacharya19) in
[dragonflydb/dragonfly#2965
- Benchmark fixes by
[@&#8203;zacharya19](https://togithub.com/zacharya19) in
[dragonflydb/dragonfly#3005
- fix(tiering): rename v2 + max_file_size by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#3004
- chore: fix tiering macos stub by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#3006
- chore: export listener stats by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#3007
- chore: pull latest helio by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#3009
- fix(server): lag is 0 when server not in stable state by
[@&#8203;adiholden](https://togithub.com/adiholden) in
[dragonflydb/dragonfly#3010
- chore: get rid of kv_args and replace it with slices to full_args by
[@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#2942
- fix(server): non auto journal write after callback finish by
[@&#8203;adiholden](https://togithub.com/adiholden) in
[dragonflydb/dragonfly#3016
- fix(server): shrink replication steaming buf by
[@&#8203;adiholden](https://togithub.com/adiholden) in
[dragonflydb/dragonfly#3012
- fix(zset): fix random in ZRANDMEMBER command by
[@&#8203;BagritsevichStepan](https://togithub.com/BagritsevichStepan) in
[dragonflydb/dragonfly#2994
- Fix benchmark by [@&#8203;adiholden](https://togithub.com/adiholden)
in
[dragonflydb/dragonfly#3017
- chore: Remove tiering test skip by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#3011
- feat(tiering): simple offload loop by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#2987
- feat(tiering): MGET support by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#3013
- Revert "chore: get rid of kv_args and replace it with slices to
full\_… by [@&#8203;romange](https://togithub.com/romange) in
[dragonflydb/dragonfly#3024
- chore(dash): Replace comparator with predicate by
[@&#8203;dranikpg](https://togithub.com/dranikpg) in
[dragonflydb/dragonfly#3025
- feat: add defragment command by
[@&#8203;BorysTheDev](https://togithub.com/BorysTheDev) in
[dragonflydb/dragonfly#3003

##### Huge thanks to all the contributors! ❤️

##### New Contributors

- [@&#8203;racamirko](https://togithub.com/racamirko) made their first
contribution in
[dragonflydb/dragonfly#2940
- [@&#8203;BagritsevichStepan](https://togithub.com/BagritsevichStepan)
made their first contribution in
[dragonflydb/dragonfly#2994

**Full Changelog**:
dragonflydb/dragonfly@v1.17.0...v1.18.0

</details>

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