Re: [zfs-discuss] COMSTAR ISCSI - configuration export/import

2010-06-29 Thread Bruno Sousa 
Hmm...that easy? ;)

Thanks for the tip, i will see if that works out.

Bruno

On 29-6-2010 2:29, Mike Devlin wrote:
 I havnt tried it yet, but supposedly this will backup/restore the
 comstar config:

 $ svccfg export -a stmf  ⁠comstar⁠.bak.${DATE}

 If you ever need to restore the configuration, you can attach the
 storage and run an import:

 $ svccfg import ⁠comstar⁠.bak.${DATE}


 - Mike

 On 6/28/10, bso...@epinfante.com bso...@epinfante.com wrote:
   
 Hi all,

 Having osol b134 exporting a couple of iscsi targets to some hosts,how can
 the COMSTAR configuration be migrated to other host?
 I can use the ZFS send/receive to replicate the luns but how can I
 replicate the target,views from serverA to serverB ?

 Is there any best procedures to follow to accomplish this?
 Thanks for all your time,

 Bruno

 Sent from my HTC
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 This message has been scanned for viruses and
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Re: [zfs-discuss] COMSTAR ISCSI - configuration export/import

2010-06-29 Thread Preston Connors 
On Tue, 2010-06-29 at 08:58 +0200, Bruno Sousa wrote:
 Hmm...that easy? ;)
 
 Thanks for the tip, i will see if that works out.
 
 Bruno

Be aware of the Important Note in
http://wikis.sun.com/display/OpenSolarisInfo/Backing+Up+and+Restoring+a
+COMSTAR+Configuration regarding Backing Up and Restoring a COMSTAR
Configuration.

Important Note
An existing bug in svccfg export causes data to be lost on export when
the persistent logical unit data (stored in the provider_data_pg_sbd
property group) exceeds 2 Kbytes. Refer to CR 6694511 for more details.
Because the truncation is silent, you cannot determine when data has
been lost on export. Until CR 6694511 is integrated, do not use the
instructions on this page to back up the STMF service.

 On 29-6-2010 2:29, Mike Devlin wrote:
  I havnt tried it yet, but supposedly this will backup/restore the
  comstar config:
 
  $ svccfg export -a stmf  ⁠comstar⁠.bak.${DATE}
 
  If you ever need to restore the configuration, you can attach the
  storage and run an import:
 
  $ svccfg import ⁠comstar⁠.bak.${DATE}
 
 
  - Mike
 
  On 6/28/10, bso...@epinfante.com bso...@epinfante.com wrote:

  Hi all,
 
  Having osol b134 exporting a couple of iscsi targets to some hosts,how can
  the COMSTAR configuration be migrated to other host?
  I can use the ZFS send/receive to replicate the luns but how can I
  replicate the target,views from serverA to serverB ?
 
  Is there any best procedures to follow to accomplish this?
  Thanks for all your time,
 
  Bruno
 
  Sent from my HTC
  --
  This message has been scanned for viruses and
  dangerous content by MailScanner, and is
  believed to be clean.
 
 
  

 
 


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Atlantic.Net

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Re: [zfs-discuss] COMSTAR ISCSI - configuration export/import

2010-06-29 Thread Bruno Sousa 
Ouch...!
Thanks for the head's up, and is there any workaround for this?

Can i for instance :

   1. Create the iscsi block on the primary server with command : zfs
  create -p -s -V 10G vol0/iscsi/LUN_10GB
   2. Use sbdadm to make the lun available with command : sbdadm
  create-lu /dev/zvol/rdsk/vol0/iscsi/LUN_10GB
   3. Add a view to this LUN with the command : stmfadm add-view uuid_of_LUN
   4. use zfs send/receive to replicate this LUN from the primary server
  to the backup server
   5. on the backserver use sbdadm create-lu or import-lu
  /dev/zvol/rdsk/vol0/iscsi/LUN_10GB

Thanks for all the tips.

Bruno

On 29-6-2010 14:10, Preston Connors wrote:
 On Tue, 2010-06-29 at 08:58 +0200, Bruno Sousa wrote:
   
 Hmm...that easy? ;)

 Thanks for the tip, i will see if that works out.

 Bruno
 
 Be aware of the Important Note in
 http://wikis.sun.com/display/OpenSolarisInfo/Backing+Up+and+Restoring+a
 +COMSTAR+Configuration regarding Backing Up and Restoring a COMSTAR
 Configuration.

 Important Note
 An existing bug in svccfg export causes data to be lost on export when
 the persistent logical unit data (stored in the provider_data_pg_sbd
 property group) exceeds 2 Kbytes. Refer to CR 6694511 for more details.
 Because the truncation is silent, you cannot determine when data has
 been lost on export. Until CR 6694511 is integrated, do not use the
 instructions on this page to back up the STMF service.

   
 On 29-6-2010 2:29, Mike Devlin wrote:
 
 I havnt tried it yet, but supposedly this will backup/restore the
 comstar config:

 $ svccfg export -a stmf  ⁠comstar⁠.bak.${DATE}

 If you ever need to restore the configuration, you can attach the
 storage and run an import:

 $ svccfg import ⁠comstar⁠.bak.${DATE}


 - Mike

 On 6/28/10, bso...@epinfante.com bso...@epinfante.com wrote:
   
   
 Hi all,

 Having osol b134 exporting a couple of iscsi targets to some hosts,how can
 the COMSTAR configuration be migrated to other host?
 I can use the ZFS send/receive to replicate the luns but how can I
 replicate the target,views from serverA to serverB ?

 Is there any best procedures to follow to accomplish this?
 Thanks for all your time,

 Bruno

 Sent from my HTC
 --
 This message has been scanned for viruses and
 dangerous content by MailScanner, and is
 believed to be clean.


 
 
   
   

 

   


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Re: [zfs-discuss] COMSTAR ISCSI - configuration export/import

2010-06-29 Thread Josh Simon 

You may wish to look at this thread:
http://opensolaris.org/jive/thread.jspa?threadID=128046tstart=0 (last 
post):


 start quote from thread 

Hi everybody,

after looking into the current on source code (b134) into
/usr/src/lib/libstmf/common/store.c, I don't think that this bug
does still have an impact on COMSTAR.

The code there chunks the provider_data_prop (thats the stuff that
can get longer than 4kb) into several separate properties 
provider_data_prop-N with 4kb length, when it stores it and

reads it back by the same algorithm.

If this would still be an issue (or ever was), you would not be able
to reboot your machine without loosing your data, since libstmf
will read the data after reboot from libscf again.

svccfg export -a stmf will only dump what libstmf has put into
it before.

So as far as I can say this warning in connection to COMSTAR is simply 
wrong and not true anymore.


end quote from thread 

Josh Simon

On 06/29/2010 08:10 AM, Preston Connors wrote:

On Tue, 2010-06-29 at 08:58 +0200, Bruno Sousa wrote:

Hmm...that easy? ;)

Thanks for the tip, i will see if that works out.

Bruno


Be aware of the Important Note in
http://wikis.sun.com/display/OpenSolarisInfo/Backing+Up+and+Restoring+a
+COMSTAR+Configuration regarding Backing Up and Restoring a COMSTAR
Configuration.

Important Note
An existing bug in svccfg export causes data to be lost on export when
the persistent logical unit data (stored in the provider_data_pg_sbd
property group) exceeds 2 Kbytes. Refer to CR 6694511 for more details.
Because the truncation is silent, you cannot determine when data has
been lost on export. Until CR 6694511 is integrated, do not use the
instructions on this page to back up the STMF service.


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Re: [zfs-discuss] COMSTAR ISCSI - configuration export/import

2010-06-28 Thread Mike Devlin 
I havnt tried it yet, but supposedly this will backup/restore the
comstar config:

$ svccfg export -a stmf  ⁠comstar⁠.bak.${DATE}

If you ever need to restore the configuration, you can attach the
storage and run an import:

$ svccfg import ⁠comstar⁠.bak.${DATE}


- Mike

On 6/28/10, bso...@epinfante.com bso...@epinfante.com wrote:
 Hi all,

 Having osol b134 exporting a couple of iscsi targets to some hosts,how can
 the COMSTAR configuration be migrated to other host?
 I can use the ZFS send/receive to replicate the luns but how can I
 replicate the target,views from serverA to serverB ?

 Is there any best procedures to follow to accomplish this?
 Thanks for all your time,

 Bruno

 Sent from my HTC
 --
 This message has been scanned for viruses and
 dangerous content by MailScanner, and is
 believed to be clean.



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