Joel
the server was at 3.7.4, running on Solaris 7.
we have since moved to Sol8/tsm4.1.3, but don't intend experimenting with
the mirroring (both log and db are tsm mirrored).
-=Dave=-
-----Original Message-----
From: Joel Fuhrman [mailto:[EMAIL PROTECTED]]
Sent: 13 June 2001 03:28
To: [EMAIL PROTECTED]
Subject: Re: tsm mirroring vs pprc
Dave, what the level of the TSM server that caused this problem?
On Tue, 12 Jun 2001, Frost, Dave wrote:
> Richard,
>
> "BTDTGTTS"
>
> We are running tsm using san attached emc for all disk storage. On
initial
> setup of the emc, we decided to stop using log/db mirroring, and use the
emc
> mirroring instead.
>
> Soon afterwards, we had 2 instances where we could not restart the server.
> Both times the server failed to restart because of an inconsistency in the
> db log file. The emc mirroring had faithfully replicated the
inconsistency,
> of course. In each case, the database had to be restored. Given a 35 GB
> database, a restore can take about 2.5 hours.
>
> IBM said that they "strongly recommend tsm mirroring", preferably with
> verification.
>
> So do we, now.
>
> regards
>
> -=Dave=-
>
> -----Original Message-----
> From: Richard Bates [mailto:[EMAIL PROTECTED]]
> Sent: 08 June 2001 12:25
> To: [EMAIL PROTECTED]
> Subject: tsm mirroring vs pprc
>
>
> Folks,
>
> Customer site: TSM running on AIX. 2 x IBM Enterprise Storage Server, one
> per data centre. SAN connecting it all together.
>
> Problem: I've seen and read all the posts about TSM mirroring vs AIX
> mirroring vs RAID mirroring. I understand the probem with partial page
> writes and prefer TSM mirroring. We had planned to implement TSM
mirroring
> with a copy of the database and recovery log on IBM ESS in both of the
data
> centres.
>
> However company strategy says that *all* mirroring must be done via PPRC.
> Does anyone have any experience with PPRC? Can it cope with partial page
> writes? Am I safer to use TSM mirroring?
>
> Regards
> Richard.
>
> Richard Bates
> Storage Specialist
> ITS - SB - Enterprise Consultancy Services
> ==========================================
> Voice : 00 44 (0) 1926 462298 (HICOM : 662298) (MOBEX : 270798)
> [EMAIL PROTECTED]
>
> _____________________________________________________________________
> This message has been checked for all known viruses by MessageLabs Virus
> Control Centre.
>
> www.guardianit.com
>
> The information contained in this email is confidential and intended
> only for the use of the individual or entity named above. If the reader
> of this message is not the intended recipient, you are hereby notified
> that any dissemination, distribution, or copying of this communication
> is strictly prohibited. Guardian iT Group will accept no responsibility
> or liability in respect to this email other than to the addressee. If you
> have received this communication in error, please notify us
> immediately via email: [EMAIL PROTECTED]
>
> _____________________________________________________________________
> This message has been checked for all known viruses by MessageLabs Virus
Control Centre.
>
_____________________________________________________________________
This message has been checked for all known viruses by MessageLabs Virus
Control Centre.
www.guardianit.com
The information contained in this email is confidential and intended
only for the use of the individual or entity named above. If the reader
of this message is not the intended recipient, you are hereby notified
that any dissemination, distribution, or copying of this communication
is strictly prohibited. Guardian iT Group will accept no responsibility
or liability in respect to this email other than to the addressee. If you
have received this communication in error, please notify us
immediately via email: [EMAIL PROTECTED]
_____________________________________________________________________
This message has been checked for all known viruses by MessageLabs Virus Control
Centre.
