Hi,

I am backing up to a different partition which is about 5 times size of 
the database partition, when you manually check the partition for the 
backup files is always complete but the server will still be in a pause 
state. I have 2 different servers in 2 different location and one is fine 
but the other not.

Regards,

Thomas Boadu ¦ IS Systems Manager
First Capital Connect ¦ Hertford House, London
DDI 020 8347 4817  ¦ Mobile 07768 933 445

First Capital Connect Limited. Registered in England & Wales No. 05281077. 

Registered office: 50 Eastbourne Terrace, Paddington, London, W2 6LG

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<[email protected]> 
Sent by: [email protected]
26/07/2012 15:24
Please respond to
U2 Users List <[email protected]>


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Subject
Re: [U2] dbpause/dbresume or stopud/startud






Are you certain that the dbpause finished?  We've had cases here where
our backup scripts would hang on the dbpause command.  Those cases were
not random however.  They all happened after a "file system full" event.
When a file system is full and a UniData write occurs that results in a
file being extended, that udt session will get a message similar to
"file system full.  Clear space or add disk.  Return to continue".  The
message repeats after every return entry until it can complete the
write.  If the user leaves that message on the screen, the write that
was in progress and generated the message is still incomplete.  dbpause
will not complete until all writes that started before dbpause was
initiated are complete. dbpause temporarily blocks all other writes
initiated after the start of dbpause until dbresume is executed.  I
don't know what happens if dbresume were executed while a dbpause was
waiting on a stuck udt.

Until 7.3, the only way to find the ports with incomplete writes was to
execute a normal dbpause.  The pid of the process that dbpause is
waiting on is reported to the terminal that initiated dbpause.
Unfortunately, it does not get written to any UniData logs, so you have
to see the messages on the dbpause terminal or wherever the scripts you
have are logging anything.   With 7.3, Rocket added the -C option to
dbpause.  From the release notes:

UDT-3755 - Problem Description

UniData -- At this release, the -c option has been added to the dbpause 
command. When you specify this option, UniData checks to see if any
process 
would prevent dbpause from completing and displays details about those 
processes that would prevent completion without actually pausing the
database.

Now, after an event, we can use "dbpause -C" to find the hanging udts
before our nightly backups scripts run.  This will prevent a system hang
when all processes eventually get paused waiting for dbpause to
complete.  My thanks to Wally and the other Rocket engineers.

Dean Armbruster
System Analyst
Ferguson Entprises, Inc.

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of
[email protected]
Sent: Thursday, July 26, 2012 05:34
To: [email protected]
Subject: [U2] dbpause/dbresume or stopud/startud
Importance: High

U2users,

Will I get the same benefits by using stopud and startud as oppose to 
dbpause and dbresume? The reason for my question is that my server is 
running unidata 7.2 but 50% of the time cannot resume and stays in
dbpause 
state long after backup?

Regards,

Thomas Boadu | IS Systems Manager
First Capital Connect | Hertford House, London
DDI 020 8347 4817  | Mobile 07768 933 445

First Capital Connect Limited. Registered in England & Wales No.
05281077. 

Registered office: 50 Eastbourne Terrace, Paddington, London, W2 6LG

The contents of this e-mail and any associated files are for the
addressee 
only and should be treated as confidential. Unless you are the named 
addressee you cannot copy, use or disclose it to anyone else. If you
have 
received this e-mail in error please notify the sender immediately. The 
e-mail has originated from First Capital Connect Limited. The opinions 
expressed in this e-mail are those of the sender, not First Capital 
Connect Limited. Outbound messages are checked for all currently known 
viruses.



First Capital Connect Limited. Registered in England & Wales No.
05281077. 
Registered office: 50 Eastbourne Terrace, Paddington, London, W2 6LG.

This message is confidential. It may not be disclosed to, or used by,
anyone other than the addressee. If you receive this message in error,
please advise us immediately. 

Internet email is not necessarily secure. First does not accept
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For more information on our range of services or to book your tickets
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First Capital Connect Limited. Registered in England & Wales No. 05281077. 
Registered office: 50 Eastbourne Terrace, Paddington, London, W2 6LG.

This message is confidential. It may not be disclosed to, or used by, anyone 
other than the addressee. If you receive this message in error, please advise 
us immediately. 

Internet email is not necessarily secure. First does not accept responsibility 
for changes to any email which occur after the email has been sent. Attachments 
to this email could contain software viruses which could damage your system. 
First have checked the attachments for viruses before sending, but you should 
virus-check them before opening. 

For more information on our range of services or to book your tickets online, 
please visit:- http://www.firstgroup.com  
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