Re: ceph pg level IO sequence

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

 



Correct. This is guaranteed.

Regards,
Anand

On Fri, Jun 24, 2016 at 10:37 AM, min fang <louisfang2013@xxxxxxxxx> wrote:
Hi, as my understanding, in PG level, IOs are execute in a sequential way, such as the following cases:

Case 1:
Write A, Write B, Write C to the same data area in a PG --> A Committed, then B committed, then C.  The final data will from write C. Impossible that mixed (A, B,C) data is in the data area.

Case 2:
Write A, Write B, Read C to the same data area in a PG-> Read C will return the data from Write B, not Write A.

Are the above cases true?

thanks.

_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com




--
----------------------------------------------------------------------------
Never say never.
_______________________________________________
ceph-users mailing list
ceph-users@xxxxxxxxxxxxxx
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com

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


  Powered by Linux