Category Archives: General
Elevator Algorithm
Hello there, this will be a long post… so, i think if you have no time to waste, think again before you go ahead. And, no. I’m not Morpheus, so i cannot offer you the truth. Actually, i can just offer you my doubts. And no pills, i do not like them. My blog is [...]
Performance II
In my last post about “Performance“, i did talk about a ZFS tuning parameter: zfs_prefetch_disable. And that was a ZFS read parameter… In this post, we will take a look in another one, with the same “water to wine” effect. This time with focus on writes… We have a set of informations available for our [...]
Ganglia on OpenSolaris
As system administrators we need to have some essential info about our servers as a minimum requirement for our job, and identify patterns and obtain knowledge about trends in our workload. And, when we need to use Dtrace, MDB, or need to understand a FMA ereport… we do not have much time. Actually, i want [...]
PS3 (KEM-410 ACA)
The kids are happy again… after a few days without playing FIFA, GOW III, or GTAIV, now the PS3 it’s working, finally. But that was a long story that i will make it short to maybe help others with the same problem. Seems to be a pretty normal scenario for the first PS3 models, the [...]
Arithmetic exception
Ok, if you are a noob C programmer, you will find this post really fun, serious, it will make you LOL. If you are a noob, really noob “XYZ” programmer, maybe you find it helpfull… maybe… no. You will LOL too… So, one more time we have a core file sitting around on our servers. [...]
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Ubuntu and kids (part II)…
Well, once more was time to update the kids’ desktop. And now i see that did pass two years and i did not solve this “desktop” problem yet… In the last post my intention was change it to OpenSolaris, but i really like Ubuntu and GNU/Linux, and i think is just fine the kids learn [...]
ZFS Internals (part #10)
PLEASE BE AWARE THAT ANY INFORMATION YOU MAY FIND HERE MAY BE INACCURATE, AND COULD INCLUDE TECHNICAL INACCURACIES, TYPOGRAPHICAL ERRORS, AND EVEN SPELLING ERRORS. From the MANUAL page: The zdb command is used by support engineers to diagnose failures and gather statistics. Since the ZFS file system is always consistent on disk and is self-repairing, [...]
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