Alexey Serbin has posted comments on this change. (
http://gerrit.cloudera.org:8080/20607 )
Change subject: KUDU-613: Scan Resistant Caching
......................................................................
Patch Set 8:
(3 comments)
I took a quick look.
My request is to split this changelist into multiple pieces, at least separate
out the following:
* refactoring on cache.{h,cc} and nvm_cache.{h,cc} that preclude introducing
the SLRU cache
* introducing the SLRU cache
* introducing block cache metrics
Thank you!
http://gerrit.cloudera.org:8080/#/c/20607/8/src/kudu/util/block_cache_metrics.h
File src/kudu/util/block_cache_metrics.h:
PS8:
Why is it necessary to update the block cache metrics in the same changelist
where implementing a new type of a cache?
Is it possible to introduce block cache metrics in a separate follow-up
changelist?
http://gerrit.cloudera.org:8080/#/c/20607/8/src/kudu/util/cache.h
File src/kudu/util/cache.h:
http://gerrit.cloudera.org:8080/#/c/20607/8/src/kudu/util/cache.h@67
PS8, Line 67: // Recency list cache implementations (FIFO, LRU, etc.)
Is it possible to separate out this and other refactoring (i.e. moving
duplicated code from nvm_cache.{h,cc} and cache.{h,cc}) into a separate
changelist?
http://gerrit.cloudera.org:8080/#/c/20607/8/src/kudu/util/slru_cache.h
File src/kudu/util/slru_cache.h:
http://gerrit.cloudera.org:8080/#/c/20607/8/src/kudu/util/slru_cache.h@50
PS8, Line 50: class HandleDeleter {
: public:
: explicit HandleDeleter(SLRUCache* c)
: : c_(c) {
: }
:
: void operator()(Handle* h) const {
: if (h != nullptr) {
: c_->Release(h);
: }
: }
:
: SLRUCache* cache() const {
: return c_;
: }
:
: private:
: SLRUCache* c_;
: };
nit: maybe, it's time to templatize this class and re-use it throughout various
types of caches in util?
--
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I45531534a2049dd38c002f4dc7982df9fd46e0bb
Gerrit-Change-Number: 20607
Gerrit-PatchSet: 8
Gerrit-Owner: Mahesh Reddy <mre...@cloudera.com>
Gerrit-Reviewer: Abhishek Chennaka <achenn...@cloudera.com>
Gerrit-Reviewer: Alexey Serbin <ale...@apache.org>
Gerrit-Reviewer: Attila Bukor <abu...@apache.org>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Mahesh Reddy <mre...@cloudera.com>
Gerrit-Reviewer: Tidy Bot (241)
Gerrit-Comment-Date: Wed, 31 Jan 2024 04:44:16 +0000
Gerrit-HasComments: Yes
