Ja som uz asi pochopil o co ide. <br>Ten proces, ktory spomaloval cely chod servera - zatial bezal len jeden krat. Ked som vytvoril raidove pole. Je to nejaky Rebuild co sa spustil a bezal niekolko minut, ked som na novo vytvoril raidove pole a od vtedy som nepostrehol, ze by sa spustil znova. Uvidim ako sa to bude chovat za ostrej prevadzky ale asi je to normalne. Ja zas az tak do toho mirrorovania (Raid1) nevidim.<br>
<br>Co sa chcem ale este spytat. <br>Aky filesystem by ste pouzili na 1 TB SW-RAID1 pole pre /home particiu na ktorej bude stovka-tisic malych suborov (Maildir + dovecot + tisicka uzivatelov = mega po prdel fajlov!).<br>Potrebujem mat rychly pristup k tymto suborom. No samozrejme nechcem nijak extra vykonovo diskriminovat ani uzivatelov, ktori budu vo svojom home pracovat s "gigovymi" subormi. <br>
Nejaky schopny kompromis. Dostupne moznosti: EXT3, EXT4, btrFS a XFS.<br>Uz som si precital mnoho, mnoho pokecov a benchmarkov ale kazde sa lisia. Zatial co jeden vynasa do nebies BtrFS, tak druhy zasa preferuje ext4 a pod.<br>
<br>Kedysika som ospevoval EXT3 v standard system konfiguracii ale v urcitom momente sa na particiu nedal ulozit ziaden dalsi subor aj ked na nej bolo miesto. Zistil som, ze su plne inodes a jediny sposob ako to vyriesit bolo data-destruktivne tune2fs. Odvtedy pouzivam XFS ale nemyslim si, ze je to to prave, orechove pre take mnozsto malych fajlikov.<br>
<br>Aky na to mate nazor?<br>J.<br><br><br><br><br><br><div class="gmail_quote">2012/1/23 Matus UHLAR - fantomas <span dir="ltr"><<a href="mailto:uhlar@fantomas.sk">uhlar@fantomas.sk</a>></span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div class="im"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
On 01/23/2012 09:32 AM, Matus UHLAR - fantomas wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Pokial viem, v BIOSe je ulozeny aj softver toho RAIDU, t.j. ide o sw RAID ulozeny v ROM/flash pamati, jednak pomalsej ako RAM, jednak je ten SW RAID velmi pravdepodobne nekompatibilny s inym HW, mozno aj verziami BIOSu.<br>
</blockquote></blockquote>
<br></div><div class="im">
On 23.01.12 09:51, Peter Viskup wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
posli nejake info o tomto softveri RAIDu v BIOSe, pretoze tohoto som si nie vedomy<br>
</blockquote>
<br></div>
wikipedia:<br>
<br>
<a href="http://en.wikipedia.org/wiki/RAID#Firmware.2Fdriver-based_RAID" target="_blank">http://en.wikipedia.org/wiki/<u></u>RAID#Firmware.2Fdriver-based_<u></u>RAID</a><br>
<br>
during early stage bootup, the RAID is implemented by the firmware, and once the operating system has been more completely loaded, then the drivers take over control.<br>
<br>
Takze ten RAID v BIOSe nemusi pouzivat OS, ale musi tam byt inac by z neho nebolko mozne napr. bootovat. Samozrejme potom zalezi uz na SW (asi toho bude schopny viac ako ten BIOSacky)<div class="im"><br>
<br>
-- <br>
Matus UHLAR - fantomas, <a href="mailto:uhlar@fantomas.sk" target="_blank">uhlar@fantomas.sk</a> ; <a href="http://www.fantomas.sk/" target="_blank">http://www.fantomas.sk/</a><br>
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