пт, 4 июн. 2021 г. в 15:58, mhnx <morphinwithyou@xxxxxxxxx>: > > I wonder that when a osd came back from power-lost, all the data > scrubbing and there are 2 other copies. > PLP is important on mostly Block Storage, Ceph should easily recover > from that situation. > That's why I don't understand why I should pay more for PLP and other > protections. > > In my use case %90 of the data is cookie %10 is coldish metadata and I > don't wanna pay more features I don't need. That's it. > Using 870evo's with Nvme WAL is a good idea but In this case the Price > still goes up cause I'm using 2 osd per device. 60 osd Total across > 21Host. > > Samsung PM883 is good. We're using them for different projects. It is > at the top of the list. > These are all TLC nands and I think lowest price in the market. Its > better to have MLC but the price goes double. > > Samsung PM883 480GB SATA 6Gb/s V4 TLC 2.5" 7mm (1.3 DWPD) 1 $102,48 > Micron 5300 PRO 480GB, SATA, 2.5", 3D TLC, 1.5DWPD 1 $110,54 > Micron 5300 MAX 480GB, SATA, 2.5", 3D TLC, 5DWPD 1 $132,41 > Intel D3-S4610 480GB SATA 6Gb/s 3D TLC 2.5" 7mm 3DWPD Rev.2 1 $131,26 > > > Samsung 860 PRO SATA 2.5" SSD 512GB V-NAND 2bit MLC 600 TBW. > 860PRO is MLC, that's good but TBW is half of the PM883 and no PLP. > > I think I'm going with the PM883 if there is no other advice from the community. > > mj <lists@xxxxxxxxxxxxx>, 4 Haz 2021 Cum, 12:24 tarihinde şunu yazdı: > > > > Hi, > > > > On 5/30/21 8:45 PM, mhnx wrote: > > > Hello Samuel. Thanks for the answer. > > > > > > Yes the Intel S4510 series is a good choice but it's expensive. > > > I have 21 server and data distribution is quite well. > > > At power loss I don't think I'll lose data. All the VM's using same > > > image and the rest is cookie. > > > In this case I'm not sure I should spend extra money on PLP. > > > > > > Actually I like Samsung 870 EVO. It's cheap and I think 300TBW will be > > > enough for 5-10years. > > > Do you know any better ssd with the same price range as 870 EVO? > > > > > > Samsung 870 evo (500GB) = 5 Years or 300 TBW - $64.99 > > > Samsung 860 pro (512GB) = 5 Years or 600 TBW - $99 > > > > > > > But do these not lack power-loss protection..? > > > > We are running the Samsung PM883, as I was told that these would do much > > better as OSDs. > > > > MJ With Ceph, power loss protection is important not because it protects the data after power loss, but because it allows the drive not to waste time on fsyncs (which Ceph issues for every write). I.e. better performance. -- Alexander E. Patrakov CV: http://u.pc.cd/wT8otalK _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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