Ceph

05/19/2017

10:23 AM CephFS Bug #17468 (Closed): CephFs: IO Pauses for more than a 40 seconds, while running write intensive IOs

Unable to consistently reproduce the bug. Vishal Kanaujia

12/07/2016

09:58 AM CephFS Feature #17835 (In Progress): mds: enable killpoint tests for MDS-MDS subtree export

Vishal Kanaujia

11/28/2016

07:03 AM CephFS Feature #12132 (In Progress): cephfs-data-scan: Cleanup phase

The following xattrs are added to zeroth object:
#define XATTR_CEILING "scan_ceiling"
#define XATTR_MAX_MTIME "... Vishal Kanaujia

10/15/2016

08:28 AM CephFS Bug #17468: CephFs: IO Pauses for more than a 40 seconds, while running write intensive IOs

Further analysis of I/O drop points to correlation of MDS config parameter mds_log_max_segments and I/O drop. Using d... Vishal Kanaujia

10/13/2016

12:45 PM CephFS Bug #17468: CephFs: IO Pauses for more than a 40 seconds, while running write intensive IOs

John, there are two test cases.
1. Load files into file system. We created 900k files of 1k size
2. Run I/O tests s... Vishal Kanaujia

10/04/2016

12:38 PM CephFS Bug #17468: CephFs: IO Pauses for more than a 40 seconds, while running write intensive IOs

1. MDS runs with default configuration.
2. On MDS node, I ran following commands:
# ceph --admin-daemon ceph-md... Vishal Kanaujia

10/03/2016

01:42 PM CephFS Bug #17468 (In Progress): CephFs: IO Pauses for more than a 40 seconds, while running write intensive IOs

Vishal Kanaujia

01:27 PM CephFS Bug #17468: CephFs: IO Pauses for more than a 40 seconds, while running write intensive IOs

I collected stack unwind traces in MDS process while no I/O was observed during write ops on cephFS. Stack trace freq... Vishal Kanaujia

09/14/2016

07:11 AM CephFS Bug #17231 (Resolved): CephFS : IOs get terminated while reading/writing on larger files

It was a tool use case problem, unrelated to CephFS. Closing the bug. Vishal Kanaujia

07:09 AM CephFS Bug #17231: CephFS : IOs get terminated while reading/writing on larger files

The problem lied with usage of VDbench. If you have 256 threads, but 10 files, VDBench might fail.
From VDBench us... Vishal Kanaujia