[OpenIndiana-discuss] OpenIndiana-discuss Digest, Vol 4, Issue 64

Wed Nov 24 04:19:47 UTC 2010


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>Today's Topics:
>
>   1. Re: When adding a mirror disk to rpool (Harry Putnam)
>   2. ZFS improvements. (Carlos Varela)
>   3. Re: ZFS improvements. (Jesus Cea)
>   4. Re: find size of raw disks (Roy Sigurd Karlsbakk)
>
>
>----------------------------------------------------------------------
>
>Message: 1
>Date: Mon, 22 Nov 2010 08:10:54 -0600
>From: Harry Putnam <reader at newsguy.com>
>To: openindiana-discuss at openindiana.org
>Subject: Re: [OpenIndiana-discuss] When adding a mirror disk to rpool
>Message-ID: <87tyj98n4h.fsf at newsguy.com>
>Content-Type: text/plain; charset=us-ascii
>
>McBofh <james.c.mcpherson at gmail.com> writes:
>
>> On 22/11/10 02:18 PM, Harry Putnam wrote:
>>> I'm about to create a mirror to rpool that currently is a single
>>> disk.  I remember it being somewhat more involved than any other pool
>>> for adding a mirror.
>>>
>>> Involving the boot bits and running grub... maybe other stuff as well.
>>>
>>> I wondered if anyone has a URL where I might read about the procedure,
>>> or failing that can anyone provide a general outline of steps that
>>> need to be taken.
>>
>>
>> It's pretty easy to find via google.
>
>Thanks for the good info.
>
>What is pretty easy to some has many times turned out to be somewhat
>difficult for me.  Possibly a dimwit on this end but what were the
>pretty easy search terms you goggled with?
>
>Someone not all that familiar with the subject may not come up with
>good search strings as quick and easy as someone with a better command
>of the subject.
>
>> Note that (newdev) must be a slice.
>
>Are you talking of a slice just big enough for the boot sector here?
>
>> You might get an error message from zpool about slice 2 (s2)
>> overlapping newdev - assuming that you have setup your newdev
>> slicing correctly, you can re-issue the zpool command thusly:
>
>Thanks for the headsup and providing a ready solution... that really helps.
>
>
>
>
>------------------------------
>
>Message: 2
>Date: Mon, 22 Nov 2010 21:07:32 -0500
>From: Carlos Varela <cvarela at gmail.com>
>To: openindiana-discuss at openindiana.org
>Subject: [OpenIndiana-discuss] ZFS improvements.
>Message-ID:
>	<AANLkTi=BP4yTLxKBscy72r24LDpcLSqU_4oiUfa=7Dx0 at mail.gmail.com>
>Content-Type: text/plain; charset=ISO-8859-1
>
>Hi,
>
>I would like to know if the following improvements are possible on a future
>openindiana build:
>
>1 - Increase the maximum blocksize. Right now is set at 128k but it should
>be possible to increase (I would like to try 1MB as my files are usually
>big).
>
>2 - The compression stops if the compression is not bigger then 12.5% (?).
>Remove this limitation. If the file compresses, then it should be kept
>compressed.
>
>3- Add lzma compression to zfs (compression is slower but higher). Following
>weblink seems to discuss the possibility:
>
>http://blogs.sun.com/aalok/entry/serving_up_lzma
>
>Open to discussions why the above are good or bad.
>
>Carlos Varela
>
>
>------------------------------
>
>Message: 3
>Date: Tue, 23 Nov 2010 04:20:40 +0100
>From: Jesus Cea <jcea at jcea.es>
>To: Discussion list for OpenIndiana
>	<openindiana-discuss at openindiana.org>
>Subject: Re: [OpenIndiana-discuss] ZFS improvements.
>Message-ID: <4CEB3308.2040900 at jcea.es>
>Content-Type: text/plain; charset=ISO-8859-15
>
>-----BEGIN PGP SIGNED MESSAGE-----
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>On 23/11/10 03:07, Carlos Varela wrote:
>> Hi,
>> 
>> I would like to know if the following improvements are possible on a future
>> openindiana build:
>
>OpenIndiana is a distribution, not a kernel development group. For that
>you have to bug Illumos team.
>
>> 1 - Increase the maximum blocksize. Right now is set at 128k but it should
>> be possible to increase (I would like to try 1MB as my files are usually
>> big).
>
>You don't want that. Read/modify/write overhead would be huge. 128KB is
>big enough to provide good random access without wasting too much space
>or having a big overhead.
>
>> 2 - The compression stops if the compression is not bigger then 12.5% (?).
>> Remove this limitation. If the file compresses, then it should be kept
>> compressed.
>
>That is something you can change now in the sourcecode. I think it is
>only a single line change.
>
>> 3- Add lzma compression to zfs (compression is slower but higher). Following
>> weblink seems to discuss the possibility:
>
>New compressions would be interesting. But I am very worried about ZFS
>fragmentation. If Illumos ZFS can not interoperate with Oracle ZFS or
>FreeBSD ZFS, we will alienate the FS and the comunity.
>
>I would like to be able to boot from a dataset compressed in GZIP. That
>would be a "simple" GRUB change.
>
>Anyway, the right people to request this is Illumos, not OpenIndiana.
>
>- -- 
>Jesus Cea Avion                         _/_/      _/_/_/        _/_/_/
>jcea at jcea.es - http://www.jcea.es/     _/_/    _/_/  _/_/    _/_/  _/_/
>jabber / xmpp:jcea at jabber.org         _/_/    _/_/          _/_/_/_/_/
>.                              _/_/  _/_/    _/_/          _/_/  _/_/
>"Things are not so easy"      _/_/  _/_/    _/_/  _/_/    _/_/  _/_/
>"My name is Dump, Core Dump"   _/_/_/        _/_/_/      _/_/  _/_/
>"El amor es poner tu felicidad en la felicidad de otro" - Leibniz
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>------------------------------
>
>Message: 4
>Date: Tue, 23 Nov 2010 10:42:23 +0100 (CET)
>From: Roy Sigurd Karlsbakk <roy at karlsbakk.net>
>To: Discussion list for OpenIndiana
>	<openindiana-discuss at openindiana.org>
>Subject: Re: [OpenIndiana-discuss] find size of raw disks
>Message-ID: <25544041.42.1290505343913.JavaMail.root at zimbra>
>Content-Type: text/plain; charset=utf-8
>
>> Thanks... very helpful. I noticed though that once a disk is formatted
>> or put into a zpool the cyl no. is no longer given, but then the size
>> is shown
>> 
>> I did also find a diffeent answer too.
>> 
>> `iostat -En ' Appears to give both the names and the sizes. But
>> not sure it would still be useful in the case you describe.
>
>Try creating a dummy zpool on the drive and then destroy that. That's a quick way to fix partition messups (IMHO)
>
>Vennlige hilsener / Best regards
>
>roy
>--
>Roy Sigurd Karlsbakk
>(+47) 97542685
>roy at karlsbakk.net
>http://blogg.karlsbakk.net/
>--
>I all pedagogikk er det essensielt at pensum presenteres intelligibelt. Det er et element?rt imperativ for alle pedagoger ? unng? eksessiv anvendelse av idiomer med fremmed opprinnelse. I de fleste tilfeller eksisterer adekvate og relevante synonymer p? norsk.
>
>
>
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>End of OpenIndiana-discuss Digest, Vol 4, Issue 64
>**************************************************