Hi Sam,
Thank for your reply. I use BTRFS file system on OSDs.
Here is result of "free -hw":
total used free shared buffers cache available
Mem: 125G 58G 31G 1.2M 3.7M 36G 60G
and "ceph df":
GLOBAL:
SIZE AVAIL RAW USED %RAW USED
523T 522T 1539G 0.29
POOLS:
NAME ID USED %USED MAX AVAIL OBJECTS
............
default.rgw.buckets.data 92 597G 0.15 391T 84392
............
I was reviced this a few minutes ago.
2017-02-15 10:50 GMT+07:00 Sam Huracan <nowitzki.sammy@xxxxxxxxx>:
Hi Khang,What file system do you use in OSD node?XFS always use Memory for caching data before writing to disk.So, don't worry, it always holds memory in your system as much as possible.2017-02-15 10:35 GMT+07:00 Khang Nguyễn Nhật <nguyennhatkhang2704@xxxxxxxxx> :______________________________Hi all,My ceph OSDs is running on Fedora-server24 with config are:128GB RAM DDR3, CPU Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz, 72 OSDs (8TB per OSD). My cluster was use ceph object gateway with S3 API. Now, it had contained 500GB data but it was used > 50GB RAM. I'm worry my OSD will dead if i continue put file to it. I had read "OSDs do not require as much RAM for regular operations (e.g., 500MB of RAM per daemon instance); however, during recovery they need significantly more RAM (e.g., ~1GB per 1TB of storage per daemon)." in Ceph Hardware Recommendations. Someone can give me advice on this issue? Thank_________________
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