On 24-09-15 11:06, Ilya Dryomov wrote: > On Thu, Sep 24, 2015 at 7:05 AM, Robert LeBlanc <robert@xxxxxxxxxxxxx> wrote: >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA256 >> >> If you use RADOS gateway, RBD or CephFS, then you don't need to worry >> about striping. If you write your own application that uses librados, >> then you have to worry about it. I understand that there is a >> radosstriper library that should help with that. There is also a limit >> to the size of an object that can be stored. I think I've seen the >> number of 100GB thrown around. > > Just for the sake of archives, it's 90M by default. > Are you sure? osd_max_write_size is set to 90 by default. That means that the OSD will accept a single write of 90MB at max. However, you can create an object and keep appending to the Object and have it grow to over 90MB. e.g.: - Call rados_write() and write 50MB - Call rados_append() 100 times and append 50MB in each call The total object size will be: 50 + (100 * 50) = 5050MB Wido > Thanks, > > Ilya > _______________________________________________ > ceph-users mailing list > ceph-users@xxxxxxxxxxxxxx > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com > _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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