[pve-devel] ceph : build option to double 4k write performance

DERUMIER, Alexandre alexandre.derumier at groupe-cyllene.com
Wed Jan 3 17:39:45 CET 2024

Hi,  (Happy New Year!)

I just found this ceph merge request


debian/rules: Fix build_type for massive performance gain

@@ -29,6 +29,7 @@ extraopts += -DWITH_PYTHON3=3
extraopts += -DWITH_CEPHFS_JAVA=ON
extraopts += -DWITH_SYSTEMD=ON -DCEPH_SYSTEMD_ENV_DIR=/etc/default
extraopts += -DCMAKE_BUILD_TYPE=RelWithDebInfo

"After retesting with CMAKE_BUILD_TYPE properly set to RelWithDebInfo,
4K random write performance on the cluster doubled and RocksDB
compaction times were reduced by roughly 2-3X."

I think it could be great to apply it to proxmox ceph package, as 4k
write are really the slowest thing in ceph.

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