>It might be better to create a program to convert RRD files in one go > (we can already do an XML export/import of course) though this too
>could be more trouble than it is worth. I believe so, too. Reads/writes are done usually tens of thousands in a monitoring period (with load peaks) while changing the architecture of the machine is done once a several years... In addition I believe that everyone who needed to export & import the rrd files has written such a tool himself. ;) jh ---------- Původní zpráva ---------- Od: Steve Shipway <[email protected]> Datum: 21. 1. 2013 Předmět: Re: [rrd-users] Architecture independence for rrd files "> I thought it would be a good idea on finding out how to make the rrd > structure architecture independent, and if it's supposed to be, find > out what's going on. I believe Tobi is planning architecture-independence for the RRD file for RRDtool 2.x. Making it arch-independent is not so easy (else it would have been done long ago as this has been on the cards some time). There are several problems relating to the generated C struct which is written to the file as created in memory: 1. endian - is it MSB first or LSB first (or middle byte first as in windows) 2. 23/64 bit - how big is an integer? This adjusts the size of the struct 3. alignment - does your architecture demand integers be byte-aligned and therefore generate padding bytes? 4. compiler peculiarities - some just do it differently at compile time. The first is actively checked for by RRDTool (looking for different magic numbers in the header) and - I think - so is the second. Although it knows about them, though, working around it without losing a lot of efficiency would be a big problem. It might be better to create a program to convert RRD files in one go (we can already do an XML export/import of course) though this too could be more trouble than it is worth. I think there is more discussion on this in the Github area Tobi has set up https://github.com/oetiker/rrdtool-2.x Steve Steve Shipway ITS Unix Services Design Lead University of Auckland, New Zealand Floor 1, 58 Symonds Street, Auckland Phone: +64 (0)9 3737599 ext 86487 DDI: +64 (0)9 924 6487 Mobile: +64 (0)21 753 189 Email: [email protected] Please consider the environment before printing this e-mail : 打印本邮件，将减少一棵树 存活的机会"
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