[vpsFree.cz: community-list] Jaky server (pro virtualizaci)??

Sat Nov 19 13:02:51 CET 2016

j uz davnejsie som sa chcel stavit, ozvem sa - dik, nas to vytrapilo
hlavne v suvislosti s overlayfs nad zfs


On 11/19/2016 11:58 AM, Pavel Snajdr wrote:
> Zastav se na IRC a pokecame o tech problemech, co mas se ZFS s O_DIRECT
> a tak, minimalne bych mohl vedet o nejakym funkcnim workaroundu nebo
> tak, pokud nenajdem primo reseni.
>
> Jinak Bcachefs a obecne Linuxovy FS budou inferior k ZFS vzdycky z
> jednoduchyho duvodu - ZFS je storage box plugged in your kernel cca, tj.
> resi i spoustu veci okolo, co v linux ekosystemu "resi" jadro ("resi"
> protoze pagecache, IO scheduler a podobne jsou spis spatnej vtip pro
> serverovy use-cases).
>
> /snajpa
>
> On 11/19/2016 11:50 AM, info [at] iostream.sk wrote:
>> Mno,
>>
>> tiez sme prechadzali na ZFS(preto sa nam tych hw raid kariet bez JBOD /
>> passthrough zopar tu povaluje), ZFS resp v buducnosti _dufajme_ bcachefs
>> su pre 80% beznych workloadov dobra volba aaale tak stale sa najdu
>> pripady kde hwraid s bat je vhodnejsia({DB} nad R10 napr).. a zfs ako
>> sam vies ma tiez svoje muchy(+ chybajuci wrapper na O_DIRECT robi
>> problemy s kadecim - sry ak uz poriesili)
>>
>> Inu ak niekto ma chechtaky navyse podporte vyvojara
>>
>> https://bcache.evilpiepirate.org/
>> https://www.patreon.com/bcachefs
>>
>> Este ohladom tej ponukanej zostavy, mame ich 2 + 1 takpovediac na
>> nahradne diely, asi 8 QL 4GBps FC(optika) kariet a za krabicu gigovych
>> dual sietoviek (tu je na mieste podakovat panom z financneho "priemyslu").
>>
>>
>> D.
>>
>>
>>
>> On 11/19/2016 10:44 AM, Pavel Snajdr wrote:
>>> Jaky je duvod v roce 2016 doporucovat nekomu HW raid? ;)
>>>
>>> IMHO je to akorat za trest, ne ze by to bylo k necemu dobry...
>>>
>>> A jeste to sam priznas na prikladu s konvici ;)
>>>
>>> UPS neni potreba, Xeon E3 muze byt malo velmi snadno - je to jenom
>>> desktopova rada procesoru a neda se tam dat vic jak 32G RAM.
>>>
>>> Budto se bavime o masine na vyvoj, nebo na produkci. Tohle mela byt
>>> masina na vyvoj - kdyz nejde stava v kanclu, nejde ani masina na vyvoj,
>>> to je logicke, UPS netreba.
>>>
>>> /snajpa
>>>
>>> On 11/19/2016 08:32 AM, Ondrej Beranek wrote:
>>>> Par tipu. Vzhledem k tomu ze mate snahu centralizovat tak se ti z toho
>>>> brzo stane dost nezbytna soucast.
>>>> Chces:
>>>> Xeon e3
>>>> - cim vic virtualu tim vic vykonu padne na virtualizaci
>>>> Hw Raid pole
>>>> - az na tom pojede xxx veci urcite nechces resit problemy ze odesel disk
>>>> a nebo ze je malo mista / disky se dusi(ztrata vykonu pole)
>>>> - ups
>>>> Nekde vypadne konvice a diky tomu ze mas raid pole se spoustou dat v ram
>>>> a databaze nejsou zapsany komplet tak vypadek proudu zpusobi poskozeni
>>>> dat. Typicky ti staci 5min aby doslo k sync.
>>>>
>>>> Dne 18. 11. 2016 5:47 PM napsal uživatel <info at iostream.sk
>>>> <mailto:info at iostream.sk>>:
>>>>
>>>>     Oprava, 2x x5570
>>>>
>>>>     On 2016-11-18 16:35, info at iostream.sk <mailto:info at iostream.sk> wrote:
>>>>
>>>>         cau, za +/- 400Eur/ks ti mozem predat IBM x3650 M2 s 2x Xeon E5570,
>>>>         cca 56GB DDR3 + 4gbps FC, hw raid a nejaku tu intelacku
>>>>         dual-sietovku
>>>>         k tomu, vs bez diskov, presnu konf na poziadanie
>>>>
>>>>         dodo
>>>>
>>>>         On 2016-11-18 15:17, Tomas Srnka wrote:
>>>>
>>>>             Ahoj,
>>>>
>>>>             To je docela prestrelena cena, pozri si co to stoji na aukru
>>>>             napr.
>>>>             http://aukro.cz/hp-proliant-dl380-g7-24x2-26ghz-48gbram-ddr3-i6604756304.htm
>>>>             <http://aukro.cz/hp-proliant-dl380-g7-24x2-26ghz-48gbram-ddr3-i6604756304.htm>
>>>>             l .
>>>>
>>>>             Tomas
>>>>
>>>>
>>>>             -----Original Message-----
>>>>             From: community-list-bounces at lists.vpsfree.cz
>>>>             <mailto:community-list-bounces at lists.vpsfree.cz>
>>>>             [mailto:community-list-bounces at lists.vpsfree.cz
>>>>             <mailto:community-list-bounces at lists.vpsfree.cz>] On Behalf
>>>>             Of Honza Straka
>>>>             Kasparek
>>>>             Sent: Friday, November 18, 2016 12:56 PM
>>>>             To: vpsFree.cz Community list
>>>>             <community-list at lists.vpsfree.cz
>>>>             <mailto:community-list at lists.vpsfree.cz>>
>>>>             Subject: Re: [vpsFree.cz: community-list] Jaky server (pro
>>>>             virtualizaci)??
>>>>
>>>>             G7 jsou tam tyhle:
>>>>
>>>>             HP ProLiant DL380 G7, 1x Xeon E-5645 2.40 GHz, P410i 256 MB,
>>>>             RAM 6 GB 3x2GB
>>>>             2RX8 PC3 10600R, 3x 300 GB 10K SAS 653955-0013, 2x 460 W
>>>>             511777-001,
>>>>             DVD-ROM, 4x FAN HP ProLiant DL380 G7, 1x Xeon E-5640 2.67
>>>>             GHz, P410i 512 MB,
>>>>             RAM 6 GB 3x2GB 2RX8 PC3 10600R, 3x 146 GB 10K SAS
>>>>             507283-001, 2x 460 W
>>>>             511777-001, DVD-ROM, 4x FAN
>>>>
>>>>             15.000Kc bez DPH za kus
>>>>
>>>>             RAMky mi tam prijde malo, takze ta by asi jeste chtela navysit.
>>>>
>>>>             Honza
>>>>
>>>>             2016-11-10 13:08 GMT+01:00 Pavel Snajdr <snajpa at snajpa.net
>>>>             <mailto:snajpa at snajpa.net>>:
>>>>
>>>>                 Co chteji za tu G7 a v jaky je konfiguraci?
>>>>
>>>>                 Osobne mi prijde cokoliv nez E5 moc stary (E5 = Sandy
>>>>                 Bridge). Cili
>>>>                 G8, ale i ta G7 muze jeste stacit v pohode (s vyhledem
>>>>                 na budoucnost).
>>>>
>>>>                 My jsme @vpsFree na stejny generaci, jako je G7, v
>>>>                 podstate zacinali,
>>>>                 kdyz nepocitam uplne prvni core2quad masinu (odpovida
>>>>                 G6) a bylo to v
>>>>                 pohode; jeden quadcore s 24GB RAM byl OK na cca 30
>>>>                 kontejneru.
>>>>
>>>>                 /snajpa
>>>>
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