Commit Graph

9231 Commits

Author SHA1 Message Date
Aliaksandr Valialkin
69171b3075
Makefile: remove '-d' flag from 'go get', since this flag is deprecated
See https://go.dev/doc/go-get-install-deprecation
2024-09-08 20:11:24 +02:00
Aliaksandr Valialkin
8eef397d29
deployment/docker: update base Alpine docker image from 3.20.2 to 3.20.3
See https://alpinelinux.org/posts/Alpine-3.17.10-3.18.9-3.19.4-3.20.3-released.html
2024-09-08 19:27:05 +02:00
Aliaksandr Valialkin
cad236003b
app/vlselect: consistently reuse the original query timestamp when executing /select/logsql/query with positive limit=N query arg
Previously the query could return incorrect results, since the query timestamp was updated with every Query.Clone() call
during iterative search for the time range with up to limit=N rows.

While at it, optimize queries, which find low number of matching logs, while spend a lot of CPU time for searching
across big number of logs. The optimization reduces the upper bound of the time range to search if the current time range
contains zero matching rows.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6785
2024-09-08 14:34:46 +02:00
Aliaksandr Valialkin
297301e8c0
lib/logstorage: preserve the order of tokens to check against bloom filters in AND filters
Previously tokens from AND filters were extracted in random order. This could slow down
checking them agains bloom filters if the most specific tokens go at the beginning of the AND filters.
Preserve the original order of tokens when matching them against bloom filters,
so the user could control the performance of the query by putting the most specific AND filters
at the beginning of the query.

While at it, add tests for getCommonTokensForAndFilters() and getCommonTokensForOrFilters().

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6554
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/pull/6556
2024-09-08 12:28:34 +02:00
Aliaksandr Valialkin
4b49b62a58
lib/logstorage: improve error logging for incorrect queries passed to /select/logsql/stats_query and /select/logsql/stats_query_range functions 2024-09-08 12:28:33 +02:00
Aliaksandr Valialkin
edb1afe804
lib/logstorage: properly extract common tokens from unsupported OR filters
Previously the following query could miss rows matching !bar if these rows do not contain foo:

   foo OR !bar

This is because of incorrect detection of common tokens for OR filters - all the unsupported filters
were skipped (including the NOT filter (aka `!`)), while in this case zero common tokens must be returned.

While at it, move repetiteve code in TestFilterAnd and TestFilterOr into f function.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6554
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/pull/6556
2024-09-08 12:28:33 +02:00
Aliaksandr Valialkin
c448189f69
app/vlselect: add /select/logsql/stats_query_range endpoint for building time series panels in VictoriaLogs plugin for Grafana
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6943
Updates https://github.com/VictoriaMetrics/victorialogs-datasource/issues/61
2024-09-07 00:44:34 +02:00
Aliaksandr Valialkin
01c8e12370
app/vlselect: add /select/logsql/stats_query endpoint, which is going to be used by vmalert
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6942
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6706
2024-09-06 23:00:58 +02:00
Aliaksandr Valialkin
e90e809c00
deployment: update Go builder from Go1.23.0 to Go1.23.1
See https://github.com/golang/go/issues?q=milestone%3AGo1.23.1+label%3ACherryPickApproved
2024-09-06 22:57:56 +02:00
Aliaksandr Valialkin
c5badeea08
lib/logstorage: substitute | operator with or operator at math pipe
This is needed for avoiding confusion between the `|` operator at `math` pipe and `|` pipe delimiter.
For example, the following query was parsed unexpectedly:

   * | math foo / bar | fields x

as

   * | math foo / (bar | fields) as x

Substituting `|` with `or` inside `math` pipe fixes this ambiguity.
2024-09-06 22:43:29 +02:00
f41gh7
395894688c
app/*/multiarch: return back empty value for TARGETARCH
follow-up after 91456ab5bb

docker buildx uses special variables, such as TARGETARCH and it shouldn't be overwritten.

 See this article for details
https://www.docker.com/blog/faster-multi-platform-builds-dockerfile-cross-compilation-guide/

Signed-off-by: f41gh7 <nik@victoriametrics.com>
2024-09-06 18:15:22 +02:00
f41gh7
b9d9aad85a
docs/changelog: mention storage changes
After a5424e95b3

Signed-off-by: f41gh7 <nik@victoriametrics.com>
2024-09-06 18:13:48 +02:00
Artem Fetishev
85bf768013
lib/storage: adds metrics that count records that failed to insert
### Describe Your Changes

Add storage metrics that count records that failed to insert:

- `RowsReceivedTotal`: the number of records that have been received by
the storage from the clients
- `RowsAddedTotal`: the number of records that have actually been
persisted. This value must be equal to `RowsReceivedTotal` if all the
records have been valid ones. But it will be smaller otherwise. The
values of the metrics below should provide the insight of why some
records hasn't been added
-   `NaNValueRows`: the number of records whose value was `NaN`
- `StaleNaNValueRows`: the number of records whose value was `Stale NaN`
- `InvalidRawMetricNames`: the number of records whose raw metric name
has failed to unmarshal.

The following metrics existed before this PR and are listed here for
completeness:

- `TooSmallTimestampRows`: the number of records whose timestamp is
negative or is older than retention period
- `TooBigTimestampRows`: the number of records whose timestamp is too
far in the future.
- `HourlySeriesLimitRowsDropped`: the number of records that have not
been added because the hourly series limit has been exceeded.
- `DailySeriesLimitRowsDropped`: the number of records that have not
been added because the daily series limit has been exceeded.

---
Signed-off-by: Artem Fetishev <wwctrsrx@gmail.com>
2024-09-06 18:13:48 +02:00
Zakhar Bessarab
e4b8b82901
Vmgateway no prefix string (#784)
* app/vmgateway: allow skipping Bearer prefix, parsing access as string

- allow disabling of "Bearer" prefix check - This is needed in order to support OIDC systems where identity token is provided separately from access token and it does not contain "Bearer" prefix(such as Azure Entra ID, ex AD).a

- support parsing "vm_access" claim as a string - This is helpful for systems where claims can only be mapped to string.

Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>

* docs/changelog: mention vmgateway updates

Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>

---------

Signed-off-by: Zakhar Bessarab <z.bessarab@victoriametrics.com>
2024-09-06 16:20:29 +02:00
Aliaksandr Valialkin
08fe7949d1
lib/logstorage: consistently use nsecsPerDay constant and remove nsecPerDay constant 2024-09-06 16:18:15 +02:00
Aliaksandr Valialkin
7dcce1ca02
lib/logstorage: pre-calculate hashes from tokens used in bloom filter search
Previously per-token hashes for per-block bloom filters were re-calculated on every scanned block.
This could be slow when the number of tokens is big or when the number of blocks to scan is big.
Pre-calculate hashes for bloom filters and then use them for searching in bloom filters.
This improves performance by 2.5x for in(...) filters with many values to search inside `in()`.
2024-09-05 19:44:42 +02:00
f41gh7
6fe0a2700e
docs/changelog: mention storage NaN changes
follow-up after 39294b4919

Signed-off-by: f41gh7 <nik@victoriametrics.com>
2024-09-05 16:58:10 +02:00
Zhu Jiekun
8848614315
lib/discovery/azure: fix host check in next link in Azure SD (#6915)
Previous bugfix at 49f63b2 only partially fixed pagination host validation error.

 Before this fix it was:
```
unexpected nextLink host \"management.azure.com\", expecting \"https://management.azure.com\"
```

Now we only check the `Host` without schema. 

However, when Azure respond `nextLink` in `Host:Port` format, the
`nextLink` check will fail:
```
unexpected nextLink host \"management.azure.com:443\", expecting \"management.azure.com\"
```

This pull request further relaxes the checks by only checking the
`Hostname`.

---

 related issue: https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6912
2024-09-05 16:58:10 +02:00
Artem Fetishev
8bdf52977f
lib/storage: do not drop stale NaN samples (#6936)
This patch reverts 1fd3385

After discussing it we've come to conclusion that this is a valid
behavior which can be avoided by deleting the time series only once the
corresponding stale NaNs have been received.

On the other hand, the fix leads to lost stale NaNs in some rare but
valid use cases. For example:

- In a cluster configuration the samples for a given time series are
normally sent to the same vmstorage replica. However, wminsert may
reroute the samples to another replica because the original one is down
or is overloaded. In this case the stale NaN may end up on a replica
that has no data for that time series, but we still want to record that
sample.

Thus, reverting that fix.

---

related issue https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5069

Signed-off-by: Artem Fetishev <wwctrsrx@gmail.com>
2024-09-05 16:58:10 +02:00
Hui Wang
9cb1704d3c
lib/storage: fix metric vm_object_references{type="indexdb"} (#6937)
follow up
4ecc370acb

### Describe Your Changes

Please provide a brief description of the changes you made. Be as
specific as possible to help others understand the purpose and impact of
your modifications.

### Checklist

The following checks are **mandatory**:

- [ ] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).
2024-09-05 16:57:48 +02:00
Aliaksandr Valialkin
2630497e2c
lib/logstorage: delete unused function - bloomfilter.containsAny 2024-09-05 16:57:47 +02:00
Aliaksandr Valialkin
5763a957ef
lib/logstorage: properly fix incorrect extraction of common tokens for OR filters at distinct log fields
Previously (f1:foo OR f2:bar) was incorrectly returning `foo` token for `f1` and `bar` token for `f2`.
These tokens were used for checking against bloom filter for every data block, so the data block,
which didn't contain simultaneously `foo` token for `f1` field and `bar` token for `f2` field, was skipped.
This was incorrect, since such a block may contain logs matching the original OR filter.

The fix is to return common tokens from `OR`-delimted filters only if these tokens exist at EVERY such filter
for the given field name. If some `OR`-delimited filter misses the given field name, then `OR`-delimited filters
do not contain common tokens, which could be used for checking against bloom filter.

While at it, add more tests covering various edge cases for filters delimited by AND and OR.

Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/6554
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/pull/6556
2024-09-05 16:57:47 +02:00
Aliaksandr Valialkin
d04dbbc7b5
Makefile: update golangci-lint from v1.60.1 to v1.60.3
See https://github.com/golangci/golangci-lint/releases/tag/v1.60.3
2024-09-05 16:57:47 +02:00
Artem Navoiev
3fa0c17df1
docs: remove old png file as we have webp now
Signed-off-by: Artem Navoiev <tenmozes@gmail.com>
2024-09-05 16:57:47 +02:00
Github Actions
2150382566
Automatic update Grafana datasource docs from VictoriaMetrics/victorialogs-datasource@edd3259 (#6946) 2024-09-05 16:57:47 +02:00
hagen1778
06de23d23b
docs: fix typo in vmagent.md
Signed-off-by: hagen1778 <roman@victoriametrics.com>
2024-09-05 16:57:47 +02:00
Dmytro Kozlov
a4b0542be7
deployment: upgrade datasource versions (#6935)
### Describe Your Changes

Upgraded victoriametrics and victorialogs data source versions.

### Checklist

The following checks are **mandatory**:

- [x] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).
2024-09-05 16:57:46 +02:00
f41gh7
3e0bfb2b38
docs/changelog: mention enterprise changes
Signed-off-by: f41gh7 <nik@victoriametrics.com>
2024-09-04 15:39:55 +02:00
f41gh7
64361c2d7a
follow-up after 01430a155c
* properly check SeverityNumber at FormatSeverity function
 it could be negative, which could cause panic for victorialogs
2024-09-04 15:39:55 +02:00
f41gh7
ddae38c583
docs/changelog: moves victorialogs changes to proper file
Signed-off-by: f41gh7 <nik@victoriametrics.com>
2024-09-04 15:39:55 +02:00
Roman Khavronenko
ef83ec9c21
docs: clarify why 1.102.1 was publicly available (#6933)
### Describe Your Changes

Please provide a brief description of the changes you made. Be as
specific as possible to help others understand the purpose and impact of
your modifications.

### Checklist

The following checks are **mandatory**:

- [ ] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).

Signed-off-by: hagen1778 <roman@victoriametrics.com>
2024-09-04 15:39:55 +02:00
hagen1778
e9964eef64
docs: bump last LTS versions
Signed-off-by: hagen1778 <roman@victoriametrics.com>
2024-09-04 15:39:55 +02:00
Andrii Chubatiuk
711f2cc4f2
vlinsert: added opentelemetry logs support
Commit adds the following changes:

* Adds support of OpenTelemetry logs for Victoria Logs with protobuf encoded messages

*  json encoding is not supported for the following reasons:
   - It brings a lot of fragile code, which works inefficiently.
   - json encoding is impossible to use with language SDK.

* splits metrics and logs structures at lib/protoparser/opentelemetry/pb package.

* adds docs with examples for opentelemetry logs.

---
Related issue: https://github.com/VictoriaMetrics/VictoriaMetrics/issues/4839

Co-authored-by: AndrewChubatiuk <andrew.chubatiuk@gmail.com>
Co-authored-by: f41gh7 <nik@victoriametrics.com>
2024-09-03 20:24:01 +02:00
f41gh7
dcc525b388
follow-up after 1731c0eabf
* updates change log
* adds VL-Debug http header
* updates doc
* extracts only the first value of http headers for VL-Stream-Fields and VL-Ignore-Fields.
  It makes behaviour the same as Query string args. And allows to easily configure client applications.
  Since most of the client collectors don't support multi value headers.

Signed-off-by: f41gh7 <nik@victoriametrics.com>
2024-09-03 20:24:01 +02:00
Andrii Chubatiuk
d5fe4566e5
app/vlinsert: support getting _msg_field, _time_field, _stream_fields and _ignore_fields from headers
*  Many collectors don't support forwarding url query params to the remote system. It makes impossible to define stream fields for it. Workaround with proxy between VictoriaLogs and log shipper is too complicated solution.

* This commit adds the following changes:
 * Adds fallback to to headers params, if query param is empty for:
     _msg_field -> VL-Msg-Field
    _stream_fields -> VL-Stream-Fields
    _ignore_fields -> VL-Ignore-Fields
    _time_field -> VL-Time-Field
 * removes deprecations from victorialogs compose files, added more
output format examples for logstash, telegraf, fluent-bit

 related issue: https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5310
2024-09-03 20:24:00 +02:00
hagen1778
665e59e23a
dashboards/vmagent: fix legend captions for stream aggregation related panels.
Before they were displaying wrong label names.

Signed-off-by: hagen1778 <roman@victoriametrics.com>
2024-09-03 20:24:00 +02:00
Aliaksandr Valialkin
ac507466c3
all: suppress InvalidDefaultArgInFrom warning emitted by docker build when building Docker packages via make package-* command
Recent versions of `docker build` started generating the InvalidDefaultArgInFrom warning if Dockerfile contains
an ARG without default value. While this warning doesn't affect building Docker packages via `make package-*` commands,
it is better suppressing the warning, so it doesn't clutter `make package-*` output with the noise,
which can hide real issues in the future.
2024-09-03 14:05:43 +02:00
Hui Wang
a21aea5dd4
stream aggregation: perform deduplication for all received data when … (#6711)
…specifying `-streamAggr.dedupInterval` or
`-remoteWrite.streamAggr.dedupInterval` command-line flag

[The
documentation](https://docs.victoriametrics.com/stream-aggregation/)
contains conflicting descriptions regarding deduplication for
non-matched series when `-remoteWrite.streamAggr.config` and / or
`-streamAggr.config` are set:
1. Statement below says **all the received data** is deduplicated:
>[vmagent](https://docs.victoriametrics.com/vmagent/) supports
relabeling, deduplication and stream aggregation for all the received
data, scraped or pushed. Then, the collected data will be forwarded to
specified -remoteWrite.url destinations. The data processing order is
the following:
>1. all the received data is relabeled according to the specified
[-remoteWrite.relabelConfig](https://docs.victoriametrics.com/vmagent/#relabeling)
(if it is set)
>2. all the received data is deduplicated according to specified
[-streamAggr.dedupInterval](https://docs.victoriametrics.com/stream-aggregation/#deduplication)
(if it is set to duration bigger than 0)

2. Another statement says the deduplication is performed individually
for the **matching samples**
>The de-deduplication is performed after applying
[relabeling](https://docs.victoriametrics.com/vmagent/#relabeling) and
before performing the aggregation. If the -remoteWrite.streamAggr.config
and / or -streamAggr.config is set, then the de-duplication is performed
individually per each [stream aggregation
config](https://docs.victoriametrics.com/stream-aggregation/#stream-aggregation-config)
for the matching samples after applying
[input_relabel_configs](https://docs.victoriametrics.com/stream-aggregation/#relabeling).

Considering the following deduplication use cases:
1. To apply deduplication(globally or for specific remoteWrite
destination) for all the received data, scraped or pushed
--- using `-streamAggr.dedupInterval` or
`-remoteWrite.streamAggr.dedupInterval`.
2. To deduplicate and aggregate metrics that match the rule `match`
filters
--- using `-remoteWrite.streamAggr.config` and specifiying
`dedup_interval` option in [stream aggregation
config](https://docs.victoriametrics.com/stream-aggregation/#stream-aggregation-config).
3. To deduplicate all the received data while having `streamAggr.config`
for some metrics
--- no way for a single vmagent now, need to set up two level vmagents

This PR implements case3.

---------

Co-authored-by: Roman Khavronenko <roman@victoriametrics.com>
(cherry picked from commit d523015f27)
2024-09-03 10:49:38 +02:00
rtm0
cd6f2e6efe
lib/storage: improve the message of the tooManyTimeseries error (#6893)
### Describe Your Changes

This is a follow-up for #6836. Per @valyala's
[comment](https://github.com/VictoriaMetrics/VictoriaMetrics/pull/6836#discussion_r1730291704),
the error message does not reflect which flag needs to be adjusted.

### Checklist

The following checks are **mandatory**:

- [x ] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).

---------

Signed-off-by: Artem Fetishev <wwctrsrx@gmail.com>
(cherry picked from commit 4df243d530)
2024-09-03 10:49:34 +02:00
zjbztianya
42ad757ac4
dashboards: typo fix (#6920)
### Describe Your Changes

Correct the spelling error of 'vminsert' in the dashboards.

### Checklist

The following checks are **mandatory**:

- [ ] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).

(cherry picked from commit 1b1e61030b)
2024-09-03 10:49:32 +02:00
Marco Maurer (-Kilchhofer)
b367a36183
deployment/alerts: add missing description for VMagent alerts (#6921)
The 3 alerts for VMagent:
- `RejectedRemoteWriteDataBlocksAreDropped`
- `TooManyScrapeErrors`
- `TooManyWriteErrors`

missed the description annotation.
I moved the summary to description and added a generic summary to these
alerts.

### Checklist

The following checks are **mandatory**:

- [x] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).

Signed-off-by: Marco Maurer <marco.kilchhofer@gmail.com>
(cherry picked from commit f17fca718d)
2024-09-03 10:49:32 +02:00
Github Actions
d37505661f
Automatic update Grafana datasource docs from VictoriaMetrics/victorialogs-datasource@1f6f9ea (#6925)
(cherry picked from commit 78067ff2c2)
2024-09-03 10:49:31 +02:00
Github Actions
4db80f51f3
Automatic update Grafana datasource docs from VictoriaMetrics/victoriametrics-datasource@297faf8 (#6926)
(cherry picked from commit fd5469e039)
2024-09-03 10:49:31 +02:00
jackyin
66789a8144
lib/logstorage: and filter results in unexpected response (#6556)
fix #6554
andfilter shouldn't return orfilter field which result in bloomfilter
return false.

---------

Co-authored-by: hagen1778 <roman@victoriametrics.com>
(cherry picked from commit 975ed27a76)
2024-09-03 10:49:25 +02:00
Github Actions
7ea1e932ff
Automatic update operator docs from VictoriaMetrics/operator@7eaac41 (#6923)
Automated changes by
[create-pull-request](https://github.com/peter-evans/create-pull-request)
GitHub action

Signed-off-by: Github Actions <133988544+victoriametrics-bot@users.noreply.github.com>
Co-authored-by: tenmozes <1381404+tenmozes@users.noreply.github.com>
(cherry picked from commit f102b14ac9)
2024-09-03 10:49:23 +02:00
hagen1778
de2713ec01
docs: fix broken links to prev changelogs
The prev links like `/changelog_2021/`
stopped working after 9dc8d1debd
because these files now require specifying the parent `changelog` in the path, like `/changelog/changelog_2021/`.

This fix adds an alias for an old link.

Signed-off-by: hagen1778 <roman@victoriametrics.com>
(cherry picked from commit 9d94573572)
2024-09-03 10:49:20 +02:00
rtm0
5d065d2746
tests: check Metrics.RowsAddedTotal in unit tests (#6895)
### Describe Your Changes

This is a follow-up PR: Unit tests introduced in #6872 can now use
RowsAddedTotal counter whose scope was fixed in #6841.

### Checklist

The following checks are **mandatory**:

- [x] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).

Signed-off-by: Artem Fetishev <wwctrsrx@gmail.com>
Co-authored-by: Nikolay <nik@victoriametrics.com>
(cherry picked from commit 2c856c6951)
2024-09-03 10:49:18 +02:00
Roman Khavronenko
71e592e677
attempt to fix flaky TestClientProxyReadOk (#6899)
Signed-off-by: hagen1778 <roman@victoriametrics.com>
(cherry picked from commit f586082520)
2024-09-03 10:49:16 +02:00
dufucun
1aa9f7be4e
tests: fix slice init length (#6897)
### Describe Your Changes

fix slice init length

### Checklist

The following checks are **mandatory**:

- [ ] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).

Signed-off-by: dufucun <dufuchun@sohu.com>
(cherry picked from commit 95bafc8caf)
2024-08-30 11:18:21 +02:00
rtm0
602bedf362
testing: allow disabling fsync to make tests run faster (#6871)
### Describe Your Changes

fsync() ensures that the data is written to disk. In production this is
needed for data durability. However, during the development, when the
unit tests are run, this level of durability is not needed. Therefore
fsync() can be disabled which will makes test runs two times faster.

The disabling is done by setting the `DISABLE_FSYNC_FOR_TESTING`
environment variable. The valid values for this variable are the same as
the values of the arg of `go doc strconv.ParseBool`:

```
1, t, T, TRUE, true, True, 0, f, F, FALSE, false, False.
```

Any other value means `false`.

The variable is set for all test build targets. Compare running times:

Build Target | DISABLE_FSYNC_FOR_TESTING=0 | DISABLE_FSYNC_FOR_TESTING=1
----------------- | ------------------------------------------------ |
-------------------------------------------------
make test | 1m5s  | 0m22s
make test-race | 3m1s | 1m42s
make test-pure | 1m7s | 0m20s
make test-full | 1m21s | 0m32s
make test-full-386 | 1m42s | 0m36s

When running tests for a given package, fsync can be disabled as
follows:

```shell
DISABLE_FSYNC_FOR_TESTING=1 go test ./lib/storage
```

Disabling fsync() is intended for testing purposes only and the name of
the variables reflects that.

What could also have been done but haven't:

- lib/filestream/filestream.go: `Writer.MustFlush()` also uses f.Sync()
but nothing has been done to it, because the Writer.MustFlush() is not
used anywhere in the VM codebase. A side question: what is the general
policy for the unused code?
- lib/filestream/filestream.go: Writer.Write() calls `adviceDontNeed()`
which calls unix.Fdatasync(). Disabling it could potentially improve
running time, but running tests with this code disabled has shown
otherwise.

### Checklist

The following checks are **mandatory**:

- [ x] My change adheres [VictoriaMetrics contributing
guidelines](https://docs.victoriametrics.com/contributing/).

---------

Signed-off-by: Artem Fetishev <wwctrsrx@gmail.com>

(cherry picked from commit 334cd92a6c)
Signed-off-by: hagen1778 <roman@victoriametrics.com>
2024-08-30 11:18:21 +02:00