similar to: Metaslab allocation control?

Hi, I just had my Dell R610 reboot with a kernel panic when I threw a couple of zfs clone commands in the terminal at it. Now, after the system had rebooted zfs will not import my pool anylonger and instead the kernel will panic again. I have had the same symptom on my other host, for which this one is basically the backup, so this one is my last line if defense. I tried to run zdb -e

Short question: I''m curious as to how ZFS manages space (free and used) and how its usage interacts with thin provisioning provided by HDS arrays. Is there any effort to minimize the number of provisioned disk blocks that get writes so as to not negate any space benefits that thin provisioning may give? Background & more detailed questions: In Jeff Bonwick''s blog[1], he

I have a huge problem with ZFS pool fragmentation. I started investigating problem about 2 weeks ago http://www.opensolaris.org/jive/thread.jspa?threadID=34423&tstart=0 I found workaround for now - changing recordsize - but I want better solution. The best solution would be a defragmentator tool, but I can see that it is not easy. When ZFS pool is fragmented then: 1. spa_sync function is

Hi, I had a plan to set up a zfs pool with different raid levels but I ran into an issue based on some testing I''ve done in a VM. I have 3x 750 GB hard drives and 2x 320 GB hard drives available, and I want to set up a RAIDZ for the 750 GB and mirror for the 320 GB and add it all to the same pool. I tested detaching a drive and it seems to seriously mess up the entire pool and I

On Mon, 2016-02-08 at 14:22 -0800, John R Pierce wrote: > the only truly safe way to destroy data on magnetic media is to grind > the media up into filings or melt it down in a furnace. I unscrew the casing, extract the disk platter(s), slide a very strong magnet over both sides of the platter surface then bend the platter in half. How secure is that ? I can't afford a machine that

> -----Original Message----- > From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On > Behalf Of EGO-II.1 > Sent: den 9 februari 2016 09:00 > To: CentOS mailing list > Subject: Re: [CentOS] Utility to zero unused blocks on disk > > > > >> the only truly safe way to destroy data on magnetic media is to grind > >> the media up into

Running a zpool scrub on our production pool is showing a scrub rate of about 400K/s. (When this pool was first set up we saw rates in the MB/s range during a scrub). Both zpool iostat and an iostat -Xn show lots of idle disk times, no above average service times, no abnormally high busy percentages. Load on the box is .59. 8 x 3GHz, 32GB ram, 96 spindles arranged into raidz zdevs on OI 147.

Hi All ; What is the status of ZFS on linux and what are the kernel''s supported? Regards Mertol <http://www.sun.com/> http://www.sun.com/emrkt/sigs/6g_top.gif Mertol Ozyoney Storage Practice - Sales Manager Sun Microsystems, TR Istanbul TR Phone +902123352200 Mobile +905339310752 Fax +902123352222 Email <mailto:Ayca.Yalcin at Sun.COM> mertol.ozyoney at

It would be cool to get one of these and see if it can be hacked and loaded with your favorite SIP or IAX softphone. Looking at the pic, it looks like the dongle is both a soundcard and memory stick. Heck, I would be glad to have it if I could get the soundcard to work. Might as well since it is free after rebate. http://www.circuitcity.com/ssm/Accessories-for-Vonage-V-Phone-VPHONE/sem

> I'm guessing you're using standard 7,200rpm platter drives? You'll need > to share more information about your environment in order for us to > provide useful feedback. Usually though, the answer is 'caching' and/or > 'faster disks'. Yes , 7.2k rpm disks. 2T mirror (soft). In fact, I had such a preference for slightly more capacity. Unfortunately very

I''ve spent all day digging through the rails api and postgres-pr on this, I think it''s time to ask the list. Postgres stores a Date in YYYY-MM-DD format. My users want the dates in MM/DD/YYYY format. Sure, I could explicitly convert it on the app level every place where a date is displayed, but that seemed like a DRY violation. I thought I''d be clever and simply

> If you run top what are you seeing on the %Cpu(s) line? %20 On Mon, Feb 8, 2016 at 9:30 PM, Alvin Starr <alvin at netvel.net> wrote: > Slow disks will show up as higher I/Owait times. > If your seeing 99% cpu usage then your likely looking at some other problem. > > If you run top what are you seeing on the %Cpu(s) line? > > > On 02/08/2016 02:20 PM, Gokan Atmaca

Is it possible to gracefully and permanently remove a vdev from a pool without data loss? The type of pool in question here is a simple pool without redundancies (i.e. JBOD). The documentation mentions for instance offlining, but without going into the end results of doing that. The thing I''m looking for is an option to evacuate, for the lack of a better word, the data from a specific

Author: billm Repository: /hg/zfs-crypto/gate Revision: 33640e100342f4a847c599f1a1671dda6faf4e05 Log message: 6410698 ZFS metadata needs to be more highly replicated (ditto blocks) 6410700 zdb should support reading raw blocks out of storage pool 6410709 ztest: spa config can change before pool export Files: update: usr/src/cmd/mdb/common/modules/zfs/zfs.c update: usr/src/cmd/zdb/zdb.c update:

Hey all - Was playing a little with zfs today and noticed that when I was untarring a 2.5gb archive both from and onto the same spindle in my laptop, I noticed that the bytes red and written over time was seesawing between approximately 23MB/s and 0MB/s. It seemed like we read and read and read till we were all full up, then wrote until we were empty, and so the cycle went. Now: as it happens,

Hello All, My asterisk installation has now been running for over two months without a hitch, and I've decided it's time to move things around a bit. It's currently installed on a 2.7GHz Celeron under RH9 installed on a 10GB "leftover" drive. Thanks to the strange marketing method called "Mail-In-Rebate", I have a fresh 160GB drive ($50), and I'm itching to

I spend yesterday all day evading my data of one of the Windows disks, so that I can add it to the pool. Using mount-ntfs, it''s a pain due to its slowness. But once I finished, I thought "Cool, let''s do it". So I added the disk using the zero slice notation (c0d0s0), as suggested for performance reasons. I checked the pool status and noticed however that the pool size

While setting up my new system, I''m wondering whether I should go with plain directories or use ZFS filesystems for specific stuff. About the cost of ZFS filesystems, I read on some Sun blog in the past about something like 64k kernel memory (or whatever) per active filesystem. What are however the additional costs? The reason I''m considering multiple filesystems is for instance

Greetings, Quick question: I am about to acquire some disks for use with ZFS (currently using zfs-fuse v0.7.0). I''m aware of some 4k alignment issues with Western Digital advanced format disks. As far as I can tell, the Hitachi Deskstar 7K3000 (HDS723030ALA640) uses 512B sectors and so I presume does not suffer from such issues (because it doesn''t lie about the physical layout

On 02/08/2016 07:38 PM, Always Learning wrote: > On Mon, 2016-02-08 at 14:22 -0800, John R Pierce wrote: > >> the only truly safe way to destroy data on magnetic media is to grind >> the media up into filings or melt it down in a furnace. > I unscrew the casing, extract the disk platter(s), slide a very strong > magnet over both sides of the platter surface then bend the