Hello
I looked here : http://wiki.nas4free.org/doku.php?id=do ... ual_device
And it is explained that there is log or log (mirror) for zlog.
What is the difference ?
I suppose this:
- log : it allows to select a raid hardware (a raid 1 hardware)
- log mirror : we select several disks and nas4free manages the mirror.
Am I right ?
Thanks
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Its not possible for us to export from here and import it to the main forum!
[Solved] Zfs log devices : log vs log mirror ?
-
ernie
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[Solved] Zfs log devices : log vs log mirror ?
Last edited by ernie on 17 Aug 2016 22:14, edited 1 time in total.
NAS 1&2:
System: GA-6LXGH(BIOS: R01 04/30/2014) / 16 Go ECC
XigmaNAS 12.1.0.4 - Ingva (revision 7743) embedded
NAS1: Xeon E3 1241@3.5GHz, 2HDD@8To/mirror, 1SSD cache, Zlog on mirror, 1 UFS 300 Go
NAS2: G3220@3GHz, 2x3HDD@2To/strip+raidz1, 1SSD cache, Zlog on mirror
UPS: APC Back-UPS RS 900G
Case : Fractal Design XL R2
Extensions & services:
NAS1: OBI (Plex, BTSync, zrep, rclone, themes), nfs, smb, UPS,
NAS2: OBI (zrep (backup mode), themes)
System: GA-6LXGH(BIOS: R01 04/30/2014) / 16 Go ECC
XigmaNAS 12.1.0.4 - Ingva (revision 7743) embedded
NAS1: Xeon E3 1241@3.5GHz, 2HDD@8To/mirror, 1SSD cache, Zlog on mirror, 1 UFS 300 Go
NAS2: G3220@3GHz, 2x3HDD@2To/strip+raidz1, 1SSD cache, Zlog on mirror
UPS: APC Back-UPS RS 900G
Case : Fractal Design XL R2
Extensions & services:
NAS1: OBI (Plex, BTSync, zrep, rclone, themes), nfs, smb, UPS,
NAS2: OBI (zrep (backup mode), themes)
-
substr
- experienced User
- Posts: 113
- Joined: 04 Aug 2013 20:21
- Status: Offline
Re: Zfs log devices : log vs log mirror ?
Using raid 1 hardware really shouldn't have anything to do with it.
A single log is good for most cases, but if the drive fails, then you could lose seconds of data in a crash.
The mirrored log is for anybody who absolutely doesn't want that to happen. It is also possible the mirrored log would keep the pool operating normally if a log drive fails, while a single log that fails might cause the pool to become very slow or even halt.
A single log is good for most cases, but if the drive fails, then you could lose seconds of data in a crash.
The mirrored log is for anybody who absolutely doesn't want that to happen. It is also possible the mirrored log would keep the pool operating normally if a log drive fails, while a single log that fails might cause the pool to become very slow or even halt.