"Our greatest duty in this life is to help others. And please, if you can't help them, could you at least not hurt them?" - H.H. the Dalai Lama
"When buying & selling are controlled by legislation, the first thing to be bought & sold are the legislators" - P.J. O'Rourke
Dan Fitzgerald
From: "Logan, David (SST - Adelaide)" <[EMAIL PROTECTED]> Reply-To: U2 Users Discussion List <[EMAIL PROTECTED]> To: "U2 Users Discussion List" <[EMAIL PROTECTED]> Subject: RE: 2 gig limits Date: Wed, 11 Feb 2004 09:42:55 +1100
Hi Dan,
We can use filepeek quite happily on our 64bit files. Do you mean uvfixfile? I know that has restrictions and cannot be used on 64bit files. The parameter in the uvconfig file is 64BIT. If this is set to 1, all files are created by default as 64bit files.
Regards
David Logan Database Administrator HP Managed Services 139 Frome Street, Adelaide 5000 Australia
+61 8 8408 4273 +61 417 268 665
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dan Fitzgerald Sent: Wednesday, 11 February 2004 7:42 AM To: [EMAIL PROTECTED] Subject: RE: 2 gig limits
The limit is an old one from Unix having 32-bit addressing. On a system with 32-bit addressing, the limit applied to all files, including backup images (at least to disk - I'm not certain about on tape drives, although I'd assume so). Now, we have 64-bit addressing, so the upper limit is in the
pentabyte range. UniVerse and Unidata still have a default configuration
parameter of 32-bit addressing. This parameter is easily changed to 64.
Currently, the cost associated with going to 64-bit addressing for UniVerse & Unidata is the loss of a particular tool which is useful in repairing file corruption, filepeek. File corruption is pretty rare, but not unheard of, especially as hardware fails. By going to a scheme like RAID0+1 with transaction logging, you probably won't miss (watch the thread this starts...) filepeek. As an aside, reducing the amount of data in overflow reduces the risk of corruption, by minimizing the number of links, which are failure points.
So you can enable U2 64-bit addressing in the (udt/uv)config file, which
will then make the limit a historical curiosity. Or you can use dynamic files (although at the most - with a lot of luck - this gives you 4Gb), or in UniVerse you can use distributed files, which imho are a better choice anyway, making the size of a file limited only by your disk drive budget.
"Our greatest duty in this life is to help others. And please, if you can't help them, could you at least not hurt them?" - H.H. the Dalai Lama
"When buying & selling are controlled by legislation, the first thing to be bought & sold are the legislators" - P.J. O'Rourke
Dan Fitzgerald
>From: Jason Theis <[EMAIL PROTECTED]> >Reply-To: U2 Users Discussion List <[EMAIL PROTECTED]> >To: 'U2 Users Discussion List' <[EMAIL PROTECTED]> >Subject: RE: 2 gig limits >Date: Tue, 10 Feb 2004 12:40:15 -0700 > > > >We are looking to move to Universe. Does a 2 gig limit apply to Universe >as >well? Does it only apply to the backup or live data? > >JT > >-- >u2-users mailing list >[EMAIL PROTECTED] >http://www.oliver.com/mailman/listinfo/u2-users
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