EXT: Re: Is this thing still on? Memory pressure/fragmentation

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]


Yes, the learn cycles are yet another reason to not use RAID HBA’s for Ceph OSDs, at least those from *coughcough*vendor X*cough*.  Advise against them in the book but neglected to mention this among the many reasons.   Add in flaky connectors, a succession of utility and firmware bugs, the hassles of monitoring and replacing BBUs / supercaps, and hardware flaws preventing cache flushes to drives.  Just isn’t worth it.  $ are better spent using SSDs instead of spinners.  It’s more cost effective in the long run.  

Favorite:  a “show” command that locks up the card for 3-5 seconds, with no warning in the Docs.  

Ceph-large mailing list

[Index of Archives]     [Information on CEPH]     [Linux Filesystem Development]     [Ceph Development]     [Linux USB Development]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]     [XFS]

  Powered by Linux