Hello Rahul,
Your observations are accurate.
I assume that you are already doing an IS backup. An MB backup should never be
the sole scenario; it can only supplement an IS backup.
The MB backup method extracts items into a temporary file, then saves the
temporary file. You will see store.exe and nsrxchsv.exe busy during the
extraction, and fairly quiescent (awaiting the network/tape) while saving the
temporary file. In a single thread, backup time will be (avg mailbox size) *
(number of mailboxes) * (some constant for your environment). Some people have
had excellent results in starting several backup jobs at once to keep things
moving faster, especially effective in multi-CPU machines: while one job is
saving to tape, another can be extracting.
For Exchange Module 2.0 (for Exchange Server 5.5) the recover granularity is
one mailbox (overkill, but still easier than recovering a database to a scratch
server). For Exchange Module 3.1 (for Exchange Server 2000) the recover
granularity is one item.
Hope that this helps,
_Scott
-----Original Message-----
From: Rahul Parasnis [mailto:rahul.parasnis AT CREDITLYONNAIS DOT FR]
Sent: Wednesday, February 12, 2003 6:59 AM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: Re: [Networker] Exchange Backup Issues
Yes I agree that I can see more carefully and case by case for each Mailbox
what is happening .
STORE.exe behavior is not going to change , does it ? What is your
experience ?
Does this creating image thing is depending on the size of Mailbox ?
I should check for pagefile fragmentation, memory allocated to exchange .
Does the
Mailbox size ----> time taken by backup
or
number of mailboxes ----> time taken by backup
are proportional to each other . Is there any such equation that we can
derive ?
but it Appears to me that restoring single mail is not possible with
excahnge agent .
regards,
- Rahul
"Miryam Zoraida
Panqueva Romero" To: "Legato NetWorker
discussion" <NETWORKER AT LISTMAIL.TEMPLE DOT EDU>, Rahul
<zoraida.panqueva@si
Parasnis/JPN/International/CLY@CLY
stecol.com> cc:
Subject: RE: [Networker]
Exchange Backup Issues
02/12/2003 10:59 PM
My experience in this topic is:
First, Do manual backup
Then, Configure schedule backup.
You need start manual backup from exchange server, networker group ->
networker user exchange
Then mark al mailboxes at top of tree or select individual mailboxes and
start backup
Zoraida Panqueva
Consultor
Texins Sistemas de Tecnologia Avanzada
Colombia
Zoraida.panqueva AT sistecol DOT com
-----Original Message-----
From: Rahul Parasnis [mailto:rahul.parasnis AT CREDITLYONNAIS DOT FR]
Sent: Miércoles, 12 de Febrero de 2003 06:53 a.m.
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: Re: [Networker] Exchange Backup Issues
Yes Scott ,
MSEXCH:MB is working .. it does take backup of indvidual mailboxes . I
specified *@* in the remote user , could be that Windows2K domain\username
is not recognized properly by Solaris .
CLJ-DOM\Exchangeservice is the username I was specifying .
Some one on this list may have got answer already for this , please share
with me .
{ Arcserve software's Exchange backup agent can allow restore of single
mail ]
But when I see the behavior of exchange Server .
STORE.exe is executed with Memory size of 1.5 GB ( Exchange 5.5 on windows
2000 SP4 3GB Memory ) alongwith nsrxchsv.exe taking CPU time ranging from
30% to 55 %.
When STORE.exe is running nothing is getting written on Tape , once that
finishes Backup starts normally . I believe store.exe is making backup
image .
But it appears that it makes an image for each mailbox .
If I have more than 300 users I can't imgaine how much time it will take to
complete the backup . I definitely see problem here with backup time .
30 Min to backup 1 GB Data on gigabit network (!!!!!)
If anyone has fine tuning tips for exchange backups do let me know , I am
really dying to find reasonable solution for this .
best regards,
- RAHUL
"Scott Bingham"
<sbingham@legato To: "Legato NetWorker
discussion" <NETWORKER AT LISTMAIL.TEMPLE DOT EDU>, Rahul
.com>
Parasnis/JPN/International/CLY@CLY
cc:
02/11/2003 03:44 Subject: RE: [Networker]
Exchange Backup Issues
AM
Hello Rahul,
This should all work.
Are you sure that you properly specified the backup program name of
nsrxchsv.exe? If so, please look for the nsrxchsv.log file in
...nsr\applogs on the Exchange Server.
With regard to the 30 mailboxes per client: this was originally a
performance suggestion. There is nothing to keep you from backing up
all of the mailboxes at once. MB backups do have a higher impact on
your Exchange Server than database backups, and take a long time. Try
it once, and see if it fits your needs.
Thanks,
_Scott
-----Original Message-----
From: Rahul Parasnis [mailto:rahul.parasnis AT CREDITLYONNAIS DOT FR]
Sent: Sunday, February 09, 2003 6:44 PM
To: NETWORKER AT LISTMAIL.TEMPLE DOT EDU
Subject: [Networker] Exchange Backup Issues
Hello Networkers,
Is it possible to recover single mail for Exchange Server from Legato ?
I am having Networker Server 6.1 Build 186 on Solaris 8 ( E250 Machine )
Storage Node Solaris 8 with L40 with two LTO Drives and on L20 with 2
DLT7000 Drives .
I am having client Exchange Server 5.5 on windows 2000 Sp4 .
I have installed Exchange module 2.0-005
I have created three client definition for the same
win2k-Exchange-Client
1st Client has saveset defined as C:\ , SYSTEM STATE:\ , SYSTEM DB:\
2nd Client has saveset MSEXCH:\DS MSEXCH:\IS
3rd Client has saveset MSEXCH:\MB
Remote user directive I have specified the user name same as username
who
is owner of legato network remote service .
and the same user is owner of the all exchange related services .
but backup fails giving error as
* tk2kcl6:MSEXCH:MB nsrexec: authtype nsrexec
* tk2kcl6:MSEXCH:MB savefs: A required privilege is not held by the
client.
02/10/03 11:40:23 AM savegrp: tk2kcl6:probe will retry 1 more time(s)
* tk2kcl6:MSEXCH:MB 1 retry attempted
* tk2kcl6:MSEXCH:MB nsrexec: authtype nsrexec
* tk2kcl6:MSEXCH:MB savefs: A required privilege is not held by the
client.
The other thing was very surprising it's not recommended to backup more
than 30 Mailboxes with one client . we have to give -I INPUT_FILE
argument
and create no of clients where each client has mailboxes not more than
30 .
it is very inconvenient because when Exchange administrator creates a
user
I have to add the username in the File .
has anybody some automation on this ?
I think from exchange we can create list of users / 30 number inputfiles
.
Please do share if you have anything to say on this subject .
I would like to know
best regards,
- RAHUL
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