> I think this leads to the rrd as a dbms discussion we touched > a few days ago on the list. This would open up up many > possibilities but also have to potential of makeing things a > lot more complex. In my eyes it is primarily a matter of > finding a really clever design for something like this. >
It would be nice if rrdtool had some special way of interpreting the filenames and mapping them to some kind of heirarchical dbms structure. Then the application wouldn't need to know anything about what was going on under the hood. E.g. when the user does `rrdcreate /hostA/eth0_in.rrd ...', rrdtool would: - find a real file on disk containing DSes of the same format (same step, same xff, etc), or create such a file with a predefined number of empty DSes if it doesn't already exist - make a record in some database associating /hostA/eth0_in with the real filename and the internally assigned DS index - subsequent calls to rrdupdate on /hostA/eth0_in.rrd would be mapped, behind the scenes, to the real DS Maybe the filenames could be given a URL-style prefix to indicate that they are virtual? E.g. rrd:/hostA/eth0_in.rrd If they are just multiple DSes in a normal RRD file, there is a problem of how to ensure they are all updated simultaneously. However, if this was an enhanced file format, then the DSes could have independent update times - even if they were not always updated together, or even if they are being updated by separate rrdupdate processes called from shell scripts, the OS level write cache would still have a good chance of doing it's job. Regards, Daniel _______________________________________________ This e-mail may contain information that is confidential, privileged or otherwise protected from disclosure. If you are not an intended recipient of this e-mail, do not duplicate or redistribute it by any means. Please delete it and any attachments and notify the sender that you have received it in error. Unless specifically indicated, this e-mail is not an offer to buy or sell or a solicitation to buy or sell any securities, investment products or other financial product or service, an official confirmation of any transaction, or an official statement of Barclays. Any views or opinions presented are solely those of the author and do not necessarily represent those of Barclays. This e-mail is subject to terms available at the following link: www.barcap.com/emaildisclaimer. By messaging with Barclays you consent to the foregoing. Barclays Capital is the investment banking division of Barclays Bank PLC, a company registered in England (number 1026167) with its registered offic e at 1 Churchill Place, London, E14 5HP. This email may relate to or be sent from other members of the Barclays Group. _______________________________________________ _______________________________________________ rrd-developers mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-developers
