Hello, On Tue, 6 Jun 2017 08:58:07 -0300 Webert de Souza Lima wrote: > Hey Christian. > > Which settings do you mean? I played a lot > with hit_set_count, hit_set_period, min_read_recency_for_promote > and min_write_recency_for_promote. > They showed no effect when hit_set_count = 0. > Yes, that's what I meant, as in hit_set_count is an all or nothing setting. Quite a while ago when these things were added with Jewel I was clamoring for having a better control with respect to read and write promotes. As in having split osd_tier_promote_max_bytes_sec and osd_tier_promote_max_objects_sec into _read and _write parameters. In my use case I want all writes to go to the cache-tier all the time and have a mostly bored and decent backing storage, thus can get away with setting the cache-tier to readforward and go full blast on the writes. But that's less than elegant of course. Christian > > On Mon, Jun 5, 2017 at 11:54 PM, Christian Balzer <chibi@xxxxxxx> wrote: > > > > > Hello, > > > > On Tue, 06 Jun 2017 02:35:25 +0000 Webert de Souza Lima wrote: > > > > > I'd like to add that, from all tests I did, the writing of new files only > > > go directly to the cache tier if you set hit set count = 0. > > > > > Yes, that also depends on the settings of course. (which we don't know, as > > they never got posted). > > > > I was reciting from Hammer times, where this was the default case. > > > > Christian > > > > Regards, > > Webert Lima > DevOps Engineer at MAV Tecnologia > *Belo Horizonte - Brasil* -- Christian Balzer Network/Systems Engineer chibi@xxxxxxx Rakuten Communications _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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