‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Saturday, October 23rd, 2021 at 18:48, Mladen Gogala <gogala.mla...@gmail.com> wrote:
> On 10/23/21 09:37, Laura Smith wrote: > > > Hi Mladen, > > > > Yes indeed, snapshots is the primary reason, closely followed by > > zfssend/receive. > > > > I'm no stranger to using LVM snapshots with ext4/xfs but it requires a > > custom shell script to manage the whole process around backups. I feel the > > whole thing could well be a lot cleaner with zfs. > > > > Thank you for the links, I will take a look. > > > > Laura > > Yes, ZFS is extremely convenient. It's a volume manager and a file > > system, all rolled into one, with some additiional convenient tools. > > However, performance is a major concern. If your application is OLTP, > > ZFS might be a tad too slow for your performance requirements. On the > > other hand, snapshots can save you a lot of time with backups, > > especially if you have some commercial backup capable of multiple > > readers. If your application is OLTP, ZFS might be a tad too slow for > > your performance requirements. The only way to find out is to test. The > > ideal tool for testing is pgio: > > https://kevinclosson.net/2019/09/21/announcing-pgio-the-slob-method-for-postgresql-is-released-under-apache-2-0-and-available-at-github/ > > For those who do not know, Kevin Closson was the technical architect who > > has built both Exadata and EMC XTRemIO. He is now the principal engineer > > of the Amazon RDS. This part is intended only for those who would tell > > him that "Oracle has it is not good enough" if he ever decided to post here. > > Thank you Mladen for your very useful food for thought. I think my plan going forward will be to stick to the old XFS+LVM setup and (maybe) when I have some more time on my hands fire up a secondary instance with ZFS and do some experimentation with pgio. Thanks again !
