> On Mar 7, 2017, at 2:59 PM, 강경원 <[email protected]> wrote: > > Hello > I saw the zfs_dirty_data_max is 4GB. > If we have several vms and the data write request comes with 4GBps=32gbps, > the io will be throttled although we use enough ssd or nvme? zil data write > also can be about 4GB. > Can I know why default max value is 4GB? Any ideas?
It is a guess. > Sas3 bandwidth seems to be 4.8GB, is it related? No. For such high data rates, you will want to tune it. However, it is not always clear whether to increase or decrease, there are many factors that impact that decision. It is a good idea to test with the expected workload. — richard > > https://www.delphix.com/blog/delphix-engineering/tuning-openzfs-write-throttle > > Regards, > Kyungwon Kang. > > <Mail Attachment.gif> > > smartos-discuss | Archives > <https://www.listbox.com/member/archive/184463/=now> > <https://www.listbox.com/member/archive/rss/184463/21953302-fd56db47> | > Modify <https://www.listbox.com/member/?&;> Your Subscription > <http://www.listbox.com/> ------------------------------------------- smartos-discuss Archives: https://www.listbox.com/member/archive/184463/=now RSS Feed: https://www.listbox.com/member/archive/rss/184463/25769125-55cfbc00 Modify Your Subscription: https://www.listbox.com/member/?member_id=25769125&id_secret=25769125-7688e9fb Powered by Listbox: http://www.listbox.com
