Basically we run a real-time spread betting and share dealing system which receives thousands of price updates per second. At busy times we could see the main server running at 99% cpu load for extensive periods. Under these conditions dynamic files can be unreliable as it would appear that there is not enough spare CPU capacity for the split and merges to function. As dynamic they corrupted every time; as hashed they never did.
The programs have been redesigned since then and the load is not quite so dramatic but we've stayed with the hash files. The files that kept corrupting weren't that large, only about 5000 records of about 10 fields but they were being updated several times a second. Adrian Matthews IG Index ________________________________ From: [EMAIL PROTECTED] on behalf of [EMAIL PROTECTED] Sent: Wed 25/08/2004 16:43 To: [EMAIL PROTECTED] Subject: Re: [U2] UV - file load discrepance on type 30 file Adrian...could you give me specifics about why you dropped the dynamic files in favor of hashed? And how large were your files? Thanks, Debbie Reeves >From: Adrian Matthews <Adrian.Matthews <at> igindex.co.uk> >Subject: RE: [U2] UV - file load discrepancy on type 30 >file >Date: Mon, 16 Aug 2004 23:44:39 +0100 > >MFILES of 112 seems very low to me. Must be quite a small >system. > >We used to get the file load message a lot before we >dropped dynamic files(too poor under extreme load) and >went back to hashed files. At the time our MFILES was 1000. ________________________________ >>From: owner-u2-users <at> listserver.u2ug.org on behalf >>of dreeves2 <at> alltel.net >>Sent: Mon 16/08/2004 16:13 >>To: u2-users <at> listserver.u2ug.org >>Subject: [U2] UV - file load discrepancy on type 30 file >> >>When running uvfixfile on a dynamic file (currently has >>about 340,000 records)we are getting a file load >>discrepancy warning. Uvfixfile will repair it, but it >>recurs from time to time. Our software vendor >>recommended increasing MFILES in uvconfig. We have >>increased it twice, from 24, to 56 and then to 112 with >>the same results. Anybody have any ideas? Should we >>take it higher, or is there some other solution? >> >>Universe release 9.5.2.1.r8 >>AIX release 4.3.3.0 >> >>Thanks, >>Debbie Reeves ------- ------- u2-users mailing list [EMAIL PROTECTED] To unsubscribe please visit http://listserver.u2ug.org/ The information contained in this email is strictly confidential and for the use of the addressee only, unless otherwise indicated. If you are not the intended recipient, please do not read, copy, use or disclose to others this message or any attachment. Please also notify the sender by replying to this email or by telephone +44 (0)20 7896 0011 and then delete the email and any copies of it. Opinions, conclusions (etc.) that do not relate to the official business of this company shall be understood as neither given nor endorsed by it. IG Markets Limited and IG Index Plc are authorised and regulated by the Financial Services Authority and, in Australia, by the Australian Securities and Investments Commission. [demime 1.01d removed an attachment of type application/ms-tnef which had a name of winmail.dat] ------- u2-users mailing list [EMAIL PROTECTED] To unsubscribe please visit http://listserver.u2ug.org/
