thank you Josh Currently,we can reduce the primary workload by distributing read requests to replicas, but once a object becomes a extremly hot point, this stratey does not make much difference, so can we bring Tiered Storage into ceph, just like to use HSM or ILM? In this way, client can got data more effeciently. best regards! 在 2011年7月1日 上午2:04，Josh Durgin <josh.durgin@xxxxxxxxxxxxx> 写道： > On 06/27/2011 05:25 PM, huang jun wrote: >> thanks，Josh >> By default，we set two replicas for each PG,so if we use ceph >> as back-end storage of a website, you know, some files will be frequently read, >> if then of thousands clients do this, some osd's workload will be very high. >> so in this circumstance, how to balance the whole cluster's workload? > > If the files don't change often, they can be cached by the clients. If > there really is one object that is being updated and read frequently, > there's not much you can do currently. To reduce the load on the primary > OSD, we could add a flag to the MDS to tell clients to read from > replicas based on the usage. > > Josh > -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
