[opt](meta-cache) refine the meta cache #33449
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Thank you for your contribution to Apache Doris. Since 2024-03-18, the Document has been moved to doris-website. |
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TPC-H: Total hot run time: 38435 ms |
TPC-DS: Total hot run time: 184784 ms |
ClickBench: Total hot run time: 30.08 s |
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Load test result on machine: 'aliyun_ecs.c7a.8xlarge_32C64G' |
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AshinGau
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TPC-H: Total hot run time: 38323 ms |
TPC-DS: Total hot run time: 184563 ms |
ClickBench: Total hot run time: 29.83 s |
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Load test result on machine: 'aliyun_ecs.c7a.8xlarge_32C64G' |
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TPC-H: Total hot run time: 39494 ms |
TPC-DS: Total hot run time: 183657 ms |
ClickBench: Total hot run time: 30.63 s |
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Load test result on machine: 'aliyun_ecs.c7a.8xlarge_32C64G' |
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morningman
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1. Use `caffeine` instead of `guava cache` to get better performace
2. Add a new class `CacheFactory`
All (Async)LoadingCache should be built from `CacheFactory`
3. Use separator executor for different caches
1. rowCountRefreshExecutor
For row count cache.
Row count cache is an async loading cache, and we can ignore the result
if cache missing or thread pool is full.
So use a separate executor for this cache.
2. commonRefreshExecutor
For other caches. Other caches are sync loading cache.
But commonRefreshExecutor will be used for async refresh.
That is, if cache entry is missing, the cache value will be loaded in caller thread, sychronously.
if cache entry need refresh, it will be reloaded in commonRefreshExecutor.
3. fileListingExecutor
File listing is a heavy operation, so use a separate executor for it.
For fileCache, the refresh operation will still use commonRefreshExecutor to trigger refresh.
And fileListingExecutor will be used to list file.
4. Change the refresh and expire logic of caches
For most of caches, set `refreshAfterWrite` strategy, so that
even if the cache entry is expired, the old entry can still be
used while new entry is being loaded.
5. Add new global variable `enable_get_row_count_from_file_list`
Default is true, if false, will disable getting row count from file list
morningman
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Apr 17, 2024
morningman
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Apr 17, 2024
part of #33449 in branch 2.0, I do a simple fix by using a separate thread pool for row count cache. So that it won't block with other thread pool
yiguolei
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Apr 17, 2024
morningman
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morningman
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Apr 30, 2024
1. Use `caffeine` instead of `guava cache` to get better performace
2. Add a new class `CacheFactory`
All (Async)LoadingCache should be built from `CacheFactory`
3. Use separator executor for different caches
1. rowCountRefreshExecutor
For row count cache.
Row count cache is an async loading cache, and we can ignore the result
if cache missing or thread pool is full.
So use a separate executor for this cache.
2. commonRefreshExecutor
For other caches. Other caches are sync loading cache.
But commonRefreshExecutor will be used for async refresh.
That is, if cache entry is missing, the cache value will be loaded in caller thread, sychronously.
if cache entry need refresh, it will be reloaded in commonRefreshExecutor.
3. fileListingExecutor
File listing is a heavy operation, so use a separate executor for it.
For fileCache, the refresh operation will still use commonRefreshExecutor to trigger refresh.
And fileListingExecutor will be used to list file.
4. Change the refresh and expire logic of caches
For most of caches, set `refreshAfterWrite` strategy, so that
even if the cache entry is expired, the old entry can still be
used while new entry is being loaded.
5. Add new global variable `enable_get_row_count_from_file_list`
Default is true, if false, will disable getting row count from file list
dataroaring
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May 1, 2024
…4.0 (#34371) * [feature](insert)use optional location and add hive regression test (#33153) * [feature](iceberg)The new DDL syntax is added to create iceberg partitioned tables (#33338) support partition by : ``` create table tb1 (c1 string, ts datetime) engine = iceberg partition by (c1, day(ts)) () properties ("a"="b") ``` * [Enhancement](hive-writer) Adjust table sink exchange rebalancer params. (#33397) Issue Number: #31442 Change table sink exchange rebalancer params to node level and adjust these params to improve write performance by better balance. rebalancer params: ``` DEFINE_mInt64(table_sink_partition_write_min_data_processed_rebalance_threshold, "26214400"); // 25MB // Minimum partition data processed to rebalance writers in exchange when partition writing DEFINE_mInt64(table_sink_partition_write_min_partition_data_processed_rebalance_threshold, "15728640"); // 15MB ``` * [feature](profile) add transaction statistics for profile (#33488) 1. commit total time 2. fs operator total time rename file count rename dir count delete dir count 3. add partition total time add partition count 4. update partition total time update partition count like: ``` - Transaction Commit Time: 906ms - FileSystem Operator Time: 833ms - Rename File Count: 4 - Rename Dir Count: 0 - Delete Dir Count: 0 - HMS Add Partition Time: 0ms - HMS Add Partition Count: 0 - HMS Update Partition Time: 68ms - HMS Update Partition Count: 4 ``` * [feature](iceberg) add iceberg transaction implement (#33629) Issue #31442 add iceberg transaction * [feature](insert)support default value when create hive table (#33666) Issue Number: #31442 hive3 support create table with column's default value if use hive3, we can write default value to table * [refactor](filesystem)refactor `filesystem` interface (#33361) 1. Remame`list` to `globList` . The path of this `list` needs to have a wildcard character, and the corresponding hdfs interface is `globStatus`, so the modified name is `globList`. 2. If you only need to view files based on paths, you can use the `listFiles` operation. 3. Merge `listLocatedFiles` function into `listFiles` function. * [opt](meta-cache) refine the meta cache (#33449) 1. Use `caffeine` instead of `guava cache` to get better performace 2. Add a new class `CacheFactory` All (Async)LoadingCache should be built from `CacheFactory` 3. Use separator executor for different caches 1. rowCountRefreshExecutor For row count cache. Row count cache is an async loading cache, and we can ignore the result if cache missing or thread pool is full. So use a separate executor for this cache. 2. commonRefreshExecutor For other caches. Other caches are sync loading cache. But commonRefreshExecutor will be used for async refresh. That is, if cache entry is missing, the cache value will be loaded in caller thread, sychronously. if cache entry need refresh, it will be reloaded in commonRefreshExecutor. 3. fileListingExecutor File listing is a heavy operation, so use a separate executor for it. For fileCache, the refresh operation will still use commonRefreshExecutor to trigger refresh. And fileListingExecutor will be used to list file. 4. Change the refresh and expire logic of caches For most of caches, set `refreshAfterWrite` strategy, so that even if the cache entry is expired, the old entry can still be used while new entry is being loaded. 5. Add new global variable `enable_get_row_count_from_file_list` Default is true, if false, will disable getting row count from file list * [bugfix](hive)delete write path after hive insert (#33798) Issue #31442 1. delete file according query id 2. delete write path after insert * [Enhancement](multi-catalog) Rewrite `S3URI` to remove tricky virtual bucket mechanism and support different uri styles by flags. (#33858) Many domestic cloud vendors are compatible with the s3 protocol. However, early versions of s3 client will only generate path style http requests (aws/aws-sdk-java-v2#763) when encountering endpoints that do not start with s3, while some cloud vendors only support virtual host style http request. Therefore, Doris used `forceVirtualHosted` in `S3URI` to convert it into a virtual hosted path and implemented it through path style. For example: For s3 uri `s3://my-bucket/data/file.txt`, It will eventually be parsed into: - virtualBucket: my-bucket - Bucket: data (bucket must be set, otherwise the s3 client will report an error) Especially this step is particularly tricky because of the limitations of the s3 client. - Key: file.txt The path style mode is used to generate an http request similar to the virtual host by setting the endpoint to virtualBucket + original endpoint, setting the bucket and key. **However, the bucket and key here are inconsistent with the original concepts of s3, but the aws client happens to be able to generate an http request similar to the virtual host through the path style mode.** However, after #30799 we have upgrade the aws sdk version from 2.17.257 to 2.20.131. The current aws s3 client can already generate a virtual host by third party by default style of http request. So in #31111 need to set the path style option, let the s3 client use doris' virtual bucket mechanism to continue working. **Finally, the virtual bucket mechanism is too confusing and tricky, and we no longer need it with the new version of s3 client.** ### Resolution: Rewrite `S3URI` to remove tricky virtual bucket mechanism and support different uri styles by flags. This class represents a fully qualified location in S3 for input/output operations expressed as as URI. #### For AWS S3, URI common styles: - AWS Client Style(Hadoop S3 Style): `s3://my-bucket/path/to/file?versionId=abc123&partNumber=77&partNumber=88` - Virtual Host Style: `https://my-bucket.s3.us-west-1.amazonaws.com/resources/doc.txt?versionId=abc123&partNumber=77&partNumber=88` - Path Style: `https://s3.us-west-1.amazonaws.com/my-bucket/resources/doc.txt?versionId=abc123&partNumber=77&partNumber=88` Regarding the above-mentioned common styles, we can use <code>isPathStyle</code> to control whether to use path style or virtual host style. "Virtual host style" is the currently mainstream and recommended approach to use, so the default value of <code>isPathStyle</code> is false. #### Other Styles: - Virtual Host AWS Client (Hadoop S3) Mixed Style: `s3://my-bucket.s3.us-west-1.amazonaws.com/resources/doc.txt?versionId=abc123&partNumber=77&partNumber=88` - Path AWS Client (Hadoop S3) Mixed Style: `s3://s3.us-west-1.amazonaws.com/my-bucket/resources/doc.txt?versionId=abc123&partNumber=77&partNumber=88` For these two styles, we can use <code>isPathStyle</code> and <code>forceParsingByStandardUri</code> to control whether to use. Virtual Host AWS Client (Hadoop S3) Mixed Style: <code>isPathStyle = false && forceParsingByStandardUri = true</code> Path AWS Client (Hadoop S3) Mixed Style: <code>isPathStyle = true && forceParsingByStandardUri = true</code> When the incoming location is url encoded, the encoded string will be returned. For <code>getKey()</code>, <code>getQueryParams()</code> will return the encoding string * [improvement](hive)add the `queryid` to the temporary file path (#34278) `_temp_<table_name>` to `_temp_<queryid>_<table_name>`. Prevent users from having a table with the name `_temp_<table_name>`. So as to partition temp dir * [feature](Cloud) Load index data into index cache when writing data (#34046) * [Feature](hive-writer) Implements s3 file committer. (#33937) Issue Number: #31442 [Feature] (hive-writer) Implements s3 file committer. S3 committer will start multipart uploading all files on BE side, and then complete multipart upload these files on FE side. If you do not complete multi parts of a file, the file will not be visible. So in this way, the atomicity of a single file can be guaranteed. But it still cannot guarantee the atomicity of multiple files. Because hive committers have best-effort semantics, this shortens the inconsistent time window. ## ChangeList: - Add `used_by_s3_committer` in `FileWriterOptions` on BE side to start multi-part uploading files, then complete multi-part uploading files on FE side. - `cosn://`use s3 client on FE side, because it need to complete multi-part uploading files on FE side. - Add `Status directoryExists(String dir)` and `Status deleteDirectory` in `FileSystem`. --------- Co-authored-by: slothever <18522955+wsjz@users.noreply.github.com> Co-authored-by: wuwenchi <wuwenchihdu@hotmail.com> Co-authored-by: Qi Chen <kaka11.chen@gmail.com> Co-authored-by: AlexYue <yj976240184@gmail.com>
mongo360
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Aug 16, 2024
part of apache#33449 in branch 2.0, I do a simple fix by using a separate thread pool for row count cache. So that it won't block with other thread pool
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Proposed changes
Use
caffeineinstead ofguava cacheto get better performaceAdd a new class
CacheFactoryAll (Async)LoadingCache should be built from
CacheFactoryUse separator executor for different caches
rowCountRefreshExecutor
For row count cache.
Row count cache is an async loading cache, and we can ignore the result
if cache missing or thread pool is full.
So use a separate executor for this cache.
commonRefreshExecutor
For other caches. Other caches are sync loading cache.
But commonRefreshExecutor will be used for async refresh.
That is, if cache entry is missing, the cache value will be loaded in caller thread, sychronously.
if cache entry need refresh, it will be reloaded in commonRefreshExecutor.
fileListingExecutor
File listing is a heavy operation, so use a separate executor for it.
For fileCache, the refresh operation will still use commonRefreshExecutor to trigger refresh.
And fileListingExecutor will be used to list file.
Change the refresh and expire logic of caches
For most of caches, set
refreshAfterWritestrategy, so thateven if the cache entry is expired, the old entry can still be
used while new entry is being loaded.
Add new global variable
enable_get_row_count_from_file_listDefault is true, if false, will disable getting row count from file list
Further comments
If this is a relatively large or complex change, kick off the discussion at dev@doris.apache.org by explaining why you chose the solution you did and what alternatives you considered, etc...