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allow to query DB stall status #226

Merged
merged 4 commits into from
Feb 20, 2021
Merged

allow to query DB stall status #226

merged 4 commits into from
Feb 20, 2021

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hicqu
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@hicqu hicqu commented Feb 18, 2021

Signed-off-by: qupeng [email protected]

This PR adds a new property is-write-stalled to query whether the column family is in write stall or not.

Why it's necessary?

In TiKV there is a compaction filter used for GC, in which DB::write is called. So if we can query whether the DB instance is stalled or not, we can skip to create more compaction filter instances to save some resources.

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Mind explain why we need this specifically? And can that be fulfilled with a callback instead?

include/rocksdb/utilities/stackable_db.h Outdated Show resolved Hide resolved
@tabokie tabokie requested a review from yiwu-arbug February 18, 2021 09:40
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yiwu-arbug commented Feb 18, 2021

Can we implement this as a DB property? That would avoid adding the new DB method, and I think it would be easier to maintain.

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@hicqu hicqu requested a review from Connor1996 February 19, 2021 11:51
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Rest LGTM.

db/internal_stats.cc Outdated Show resolved Hide resolved
Signed-off-by: qupeng <[email protected]>
@tabokie tabokie merged commit 0d1ac74 into tikv:6.4.tikv Feb 20, 2021
@hicqu hicqu deleted the db-query-stall branch February 20, 2021 07:15
@tabokie tabokie mentioned this pull request May 9, 2022
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tabokie pushed a commit to tabokie/rocksdb that referenced this pull request May 12, 2022
This PR adds a new property is-write-stalled to query whether the column family is in write stall or not.

In TiKV there is a compaction filter used for GC, in which DB::write is called. So if we can query whether the DB instance is stalled or not, we can skip to create more compaction filter instances to save some resources.

Signed-off-by: qupeng <[email protected]>
Signed-off-by: tabokie <[email protected]>
tabokie pushed a commit that referenced this pull request May 12, 2022
This PR adds a new property is-write-stalled to query whether the column family is in write stall or not.

In TiKV there is a compaction filter used for GC, in which DB::write is called. So if we can query whether the DB instance is stalled or not, we can skip to create more compaction filter instances to save some resources.

Signed-off-by: qupeng <[email protected]>
Signed-off-by: tabokie <[email protected]>
v01dstar pushed a commit to v01dstar/rocksdb that referenced this pull request Feb 21, 2024
This PR adds a new property is-write-stalled to query whether the column family is in write stall or not.

In TiKV there is a compaction filter used for GC, in which DB::write is called. So if we can query whether the DB instance is stalled or not, we can skip to create more compaction filter instances to save some resources.

Signed-off-by: qupeng <[email protected]>
Signed-off-by: tabokie <[email protected]>
v01dstar pushed a commit to v01dstar/rocksdb that referenced this pull request Feb 22, 2024
compaction_filter: add bottommost_level into context (tikv#160)

Signed-off-by: qupeng <[email protected]>
Signed-off-by: tabokie <[email protected]>

add range for compaction filter context (tikv#192)

* add range for compaction filter context

Signed-off-by: qupeng <[email protected]>
Signed-off-by: tabokie <[email protected]>

allow no_io for VersionSet::GetTableProperties (tikv#211)

* allow no_io for VersionSet::GetTableProperties

Signed-off-by: qupeng <[email protected]>
Signed-off-by: tabokie <[email protected]>

expose seqno from compaction filter and iterator (tikv#215)

This PR supports to access `seqno` for every key/value pairs in compaction filter or iterator.
It's helpful to enhance GC in compaction filter in TiKV.

Signed-off-by: qupeng <[email protected]>
Signed-off-by: tabokie <[email protected]>

allow to query DB stall status (tikv#226)

This PR adds a new property is-write-stalled to query whether the column family is in write stall or not.

In TiKV there is a compaction filter used for GC, in which DB::write is called. So if we can query whether the DB instance is stalled or not, we can skip to create more compaction filter instances to save some resources.

Signed-off-by: qupeng <[email protected]>
Signed-off-by: tabokie <[email protected]>

Fix compatibilty issue with Titan

Signed-off-by: v01dstar <[email protected]>

filter deletion in compaction filter (tikv#344)

And delay the buffer initialization of writable file to first actual write.

---------

Signed-off-by: tabokie <[email protected]>

Adjustments for compaptibilty with 8.10.facebook

Signed-off-by: v01dstar <[email protected]>

Adjust tikv related changes with upstream

Signed-off-by: v01dstar <[email protected]>
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3 participants