3
votes
1answer
118 views

How to active HDD leds on HP MDS 600 / HP D6000?

I have a HP D6000 (sometimes called MDS 600) storage array, HP DL380p G8 with an LSI 9207-8e SAS adapter. When I am in the OmniOS (Solaris 10 fork), I can e.g. dd to one of the disks, but I don't see ...
3
votes
0answers
53 views

Using ZFS head node as database server?

I'm using a dual-head ZFS-backed NAS for high availability cluster shared storage, based on Nexenta's recommended architecture as seen here: The disks in 1 JBOD will store the database files for a ...
4
votes
1answer
302 views

Gluster + ZFS, deadlock during benchmarking: zfs_iput_taskq 100% cpu

First some background: I work at a company that runs a PHP-webapplication. We have a storage backend mounted over NFS on several webservers. Today we have the issue if one webserver writes a file over ...
0
votes
0answers
103 views

zfs recovery after hardware failure

My ZFS storage hardware failed including the rpool disks. I installed a new server and tried to import use zfs import -f poolname. I am able to see the pool and the disk utilized. But I am not able to ...
1
vote
1answer
36 views

Prevent NexentaStor analytics page from timing out

NexentaStor has a handy profiling interface that serves as a front to certain dtrace scripts. It's handy for monitoring realtime IOPS or I/O throughput of the appliance. Unfortunately, this interface ...
1
vote
1answer
442 views

How often should I defrag ZFS pools?

I ZFS scrub once a month which takes ~24 hours for the 72TB. For what I can find about how often I should scrub is: very busy pools, once per week not so busy pools, once per month or run a scrub, ...
2
votes
1answer
145 views

Best practices on VM disk management

I'm replacing two old rack servers with a new one that has plenty of power to take over the functionality the current servers. The server is a 4U rack mount with 16 3.5" SAS drive bays, two 2.5" bays, ...
8
votes
1answer
2k views

Is calculating IOPS for ZFS RAIDZ different then calculating IOPS for RAID5 & RAID6?

When calculating IOPS for traditional RAID arrays, one could use the following formula (Borrowed from Getting The Hang Of IOPS v1.3 on Symantec Connect): Ieffective = (n * Isingle) / (READ% + (F * ...
0
votes
2answers
349 views

Multiple 2 TB LUNs — ZFS or ext4-over-LVM

I am going to deploy an Ubuntu 12.04-based archiving system. Due to limitations of the SAN Storage, it can only present me with 2TB LUNs. So, I have to merge multiple 2TB LUNs to achieve the desired ...
1
vote
1answer
199 views

Does a 3ware “ECC-ERROR” matter on a JBOD when I have ZFS?

I have a FreeBSD 8.x machine running ZFS and with a 3ware 9690SA controller. The 3ware controller shows an ECC-ERROR with one of the disks: //host> /c0 show VPort Status Unit Size ...
1
vote
2answers
149 views

Advice for inserting additional disks to a ZFS mirrored pool?

I am running FreeBSD 9.1 with root on a ZFS mirrored pool. At first the pool (labelled zroot) has a total of 1TB spanning two 1TB drives. Recently we have run into disk space issues in which the ...
1
vote
1answer
269 views

ZFS configuration opinions [closed]

Currently, I'm tasked with progressively building a ZFS store. IOPS are not the priority, data security and capacity are. In essence what we have is one brute of a machine, that contains an OS ...
1
vote
2answers
325 views

Adding raw storage - iSCSI or VMDK?

We have about 10TB of files that we use on our fileserver. I'll be setting up a new server with more space and better backups. We have a SAS box with 24 drives connected to OpenIndiana server ...
1
vote
2answers
904 views

ZFS/Btrfs/LVM2-like storage with advanced features on Linux? [closed]

I have 3 identical internal 7200 RPM SATA hard disk drives on a Linux machine. I'm looking for a storage set-up that will give me all of this: Different data sets (filesystems or subtrees) can have ...
5
votes
3answers
453 views

What is the ZFS ACL limit?

Does anyone know how many user ACL's ZFS can handle? With other words: for how many users can I set ACL's like this one for the same directory? setfacl -m user:test1:rwxpDdaARWcCos:fd----:allow ...
1
vote
0answers
190 views

Solaris x86 11.1 and qlt driver — only 3/4 ports attach

I'm using the QLogic QLE2564 4-port 8Gb HBA. The problem I have is that when I attach the qlt target mode driver to the card, only 3/4 ports attach the driver. ffffc10006854e58 pciex1077,2532, ...
2
votes
1answer
176 views

Why is ZFS replication single threaded?

On my 8 core NAS I see only one core maxed out when ZFS replication over SSH is running. I would expect that transferring a snapshot would scale perfectly with the number or cores, as the snapshot ...
0
votes
1answer
124 views

Zpool list showing blank values

My problem is that when I call zpool list it gives this blank output.... NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT - - - - - - - - However a zfs ...
3
votes
2answers
3k views

ZFS over iSCSI high-availability solution

I am considering a ZFS/iSCSI based architecture for a HA/scale-out/shared-nothing database platform running on wimpy nodes of plain PC hardware and running FreeBSD 9. Will it work? What are possible ...
18
votes
2answers
2k views

ZFS Data Loss Scenarios

I'm looking toward building a largish ZFS Pool (150TB+), and I'd like to hear people experiences about data loss scenarios due to failed hardware, in particular, distinguishing between instances where ...
2
votes
1answer
763 views

HP MDS 600 compatibility questions

I've bought a used HP MDS 600 to use as JBOD to a ZFS filesystem. Originally I just assumed that it was a pretty 'dumb' box and I'd be able to use a SAS card like the 16-port LSI one, and most any ...
8
votes
3answers
2k views

Backup storage server with ZFS

I am IT everything man at a small company. I want to design a new infrastructure including a new server and a separate backup server with company wide backup policy. The most important thing in the ...
5
votes
1answer
1k views

Raidz in FreeNAS eating more space than expected

I just got 6 new 2TB drives, and added them to my FreeNAS box. I have only dealt with RAID1 previously, and each setup has given what I was expecting. However, with the 6*2TB drives, I wanted to ...
15
votes
1answer
7k views

Hosting a ZFS server as a virtual guest

I'm still new to ZFS. I've been using Nexenta but I'm thinking of switching to OpenIndiana or Solaris 11 Express. Right now, I'm at a point of considering virtualizing the ZFS server as a guest within ...
3
votes
2answers
1k views

Building one big filesystem with JBOD and ZFS

How to build a really big ZFS filesystem? The above question is vague in the 1st reading, so more precise. I know how to build big ZFS volume with one computer. e.g. get a good computer with ECC ...
13
votes
3answers
2k views

150 TB and growing, but how to grow?

My group currently has two largish storage servers, both NAS running debian linux. The first is an all-in-one 24-disk (SATA) server that is several years old. We have two hardware RAIDS set up on it ...
0
votes
1answer
195 views

What's the best file system for a 200TB Array on a MacOS 10.7? [closed]

We have a Mac server (10.7) with a 200TB disk array. We're trying to decide between HFS+ and the unsupported ZFS. Which should we use, why, and is there another choice that we haven't considered?
1
vote
1answer
107 views

ZFS: can per-user encrypted filesystems be deduplicated on block-level?

Let's assume I build a storage system where each user gets his/her own encrypted filesystem on top of a ZFS pool. Would deduplication on pool-level still work when each fs is encrypted? What ...
1
vote
2answers
411 views

ZFS: Best-practices doc state: “On systems with 1,000s of ZFS file systems…”?

The docs state: "On systems with 1,000s of ZFS file systems, provision 1 GB of extra memory for every 10,000 mounted file systems including snapshots." What does that mean - how do these people use ...
93
votes
2answers
11k views

What are the different widely used RAID levels and when should I consider them?

This is a Canonical Question about RAID levels. What are: the RAID levels typically used (including the RAID-Z family)? deployments are they commonly found in? benefits and pitfalls of each? ...
1
vote
2answers
244 views

Is it possible to do storage without RAID and unnecessary redundancy?

I'm building multiple storage nodes for Riak database. Each node contains 20-40 x 2TB drives. Riak replicates each save to 3 nodes so there I have redundancy. Now the question is that what's the best ...
1
vote
3answers
563 views

Migrate zpool to new SAS controller

Long ago, we bought an Adaptec 31605 under the impression that: a) it could do true JBOD, and b) it was well supported on OpenSolaris. Turns out both of these were incorrect. I'm trying to get my ...
4
votes
5answers
1k views

ZFS on Linux based systems

Is there anyone who has more experience with ZFS under Linux based systems ? I saw ZFS fuse library, but I don't know it;s worth a test or not. Stable, usable ? Maybe as a storage ? Or only ...
0
votes
3answers
4k views

btrfs vs. ZFS on a Ubuntu file server

I have a server which is running Ubuntu (Server Edition), and its main job is serving files through FTP (vsftpd) and AFP (netatalk). My /srv directory is starting to fill up, and I need to add more ...
0
votes
1answer
345 views

Finding the bottleneck in Nexenta?

I built a Nexentastor server (free edition) and I am having serious disk performance issues. This same box had FreeNAS on it before and it was much much faster. Here are the specs: Dual core E6600 ...
1
vote
3answers
1k views

can ZFS NAS serve storage multiple hosts?

is it possible to serve blocks of storage to multiple hosts using iSCSI protocol? each block is reserved to one writer (host) is it only limited by available NIC ports? update: shared storage ...
1
vote
2answers
872 views

how many disks can saturate a 6GSAS controller ? :LSI 9260-8i

This is my build: LSI 9260-8i: MAX read throughput of 2,875 MB/s, write performance of 1,800 MB/s 24x SAS 10K RPM drives 2x 100GB Dell SSDR (SATA) drives for ZIL and L2ARC All plugged to same ...
1
vote
2answers
5k views

Horror stories with Sun ZFS? [closed]

My companny is considering purchasing two 7320's in a cluster. Anybody have anything good or bad to say about the platform?
2
votes
3answers
4k views

recommend storage platform: Gluster Vs Nexenta

there is a new release version 3.0: http://www.gluster.com/community/documentation/index.php/Gluster_Storage_Platform has anyone tried this for VM storage? how does this compare to any ZFS based ...
2
votes
2answers
3k views

ZFS: RAIDZ and RAIDZ2 usable size?

Is the usable size of a RAIDZ array similar to the usable size of a RAID5 array? The RAID5 calculation is "(N-1) * S", where S is the size of smallest drive. Since most people use the same sized disk ...
1
vote
1answer
1k views

how-to: ZFS design and cache tuning : ARC, ZIL

storage system in consideration from below h/w lying idle: 6 x 300GB 10K SAS; 2 X 146 GB 15K SAS; 12GB DDR2 RAM; Xeon CPU 2.5Ghz two 1GB NIC ports 1 - DLink 1GB ethernet switch (1000/100 MB) 8-port ...
1
vote
4answers
3k views

JBOD: any system that can do RAID-0 can do JBOD?

any storage controller that can do RAID-0 can do JBOD? Am looking for a storage solution using ZFS, currently have Dell Perc5i and 6i not sure about their capabilities for JBOD. does ZFS really ...
2
votes
1answer
752 views

ZFS file deletion and its relationship to disk space

I deleted a large file (many gigs) from a Solaris system and it didn't seem to recover the amount of space on the zpool equal to the size of the file. Is there any reason that I wouldn't see this ...
7
votes
6answers
3k views

hardware recommendations for a DIY storage system based on ZFS [closed]

Looking to make use of old server lying idle as a proof-of-concept ...here are specs Dell PE 2900: Xeon 5110 - 2P, 12 GB RAM, 8x 300 GB 15K drives, Perc 5i+256 MB cache what additional h/w would be ...
2
votes
5answers
770 views

hardware for bulding unified storage solution using nexentastor

looking to build a box for holding 5 to 8 TB of storage using nexentastor OS. without using commercial solutions like netapp. my current list is: Intel Xeon 8GB of RAM RAID controller with 256MB ...
2
votes
4answers
3k views

Fastest way to share a Solaris (ZFS) file system with two windows servers?

I am setting up a 16TB Storage server (which will eventually double in capacity) to store media. This server needs to be read from by two windows server 2008 clients which host our companies ...
3
votes
4answers
12k views

Disabling RAID feature on HP Smart Array P400

I'm planning to use ZFS on my system (HP ML370 G5, Smart Array P400, 8 SAS disk). I want ZFS to manage all disks individually, so it can utilize better scheduling (i.e. I want to use software RAID ...
31
votes
11answers
20k views

ZFS vs XFS

We're considering building a ~16TB storage server. At the moment, we're considering both ZFS and XFS as filesystem. What are the advantages, disadvantages? What do we have to look for? Is there a ...