On 09/04/18 16:49, Vincent Royer wrote:RAID and JBOD are completely different things. JBODs are just that, bunches of disks, and they don't have any cache above them in hardware. If you're going to use ZFS under Gluster, look at the ZFS docs first. Short answer is no. If Gluster passes sync writes down to the lower level FS as sync, and you decide to use a ZFS SLOG device, usually an SSD, it should have power fail protection capacitors. Do *not* use a RAID controller for ZFS, use a decent HBA instead, so ZFS can access the disks directly. Using a RAID controller is not only wasteful it's setting yourself up for a world of pain when a ZFS VDEV member device fails. Don't do it. -- This message is intended only for the addressee and may contain confidential information. Unless you are that person, you may not disclose its contents or use it in any way and are requested to delete the message along with any attachments and notify us immediately. This email is not intended to, nor should it be taken to, constitute advice. The information provided is correct to our knowledge & belief and must not be used as a substitute for obtaining tax, regulatory, investment, legal or any other appropriate advice. "Transact" is operated by Integrated Financial Arrangements Ltd. 29 Clement's Lane, London EC4N 7AE. Tel: (020) 7608 4900 Fax: (020) 7608 5300. (Registered office: as above; Registered in England and Wales under number: 3727592). Authorised and regulated by the Financial Conduct Authority (entered on the Financial Services Register; no. 190856). |
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