Re: Performance improvement suggestion

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


> I’ve heard conflicting asserts on whether the write returns with min_size shards have been persisted, or all of them.

I think it waits until all replicas have written the data, but from
simplistic tests with fast network and slow drives, the extra time
taken to write many copies is not linear to what it takes to write the
first, so unless you do go min_size=1 (not recommended at all), the
extra copies are not slowing you down as much as you'd expect. At
least not if the other drives are not 100% busy.

I get that this thread started on having one bad drive, and that is
another scenario of course, but having repl=2 or repl=3 is not about
writes taking 100% - 200% more time than the single write, it is less.

May the most significant bit of your life be positive.
ceph-users mailing list -- ceph-users@xxxxxxx
To unsubscribe send an email to ceph-users-leave@xxxxxxx

[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