Za pakati Linux Pali ma patches omwe aperekedwa kuti agwiritse ntchito chipangizo cha DRBD 9 chogawidwa chobwerezabwereza, chomwe chimalola kupanga RAID-1 array yopangidwa kuchokera ku ma drive olumikizidwa ndi netiweki olumikizidwa ku machitidwe osiyanasiyana. Choyamba dalaivala adzayesedwa mu nthambi ya linux-next ndikumalizidwa kuti agwirizane ndi kernel. Linux 7.2.
Kukhazikitsa kwakale kwa DRBD kwaphatikizidwa mu kernel kuyambira mtundu wa 2.6.33, womwe unatulutsidwa zaka 16 zapitazo. Khodi ya kernel imachokera ku nthambi ya DRBD 8, yomwe imasiyana kwambiri ndi nthambi ya DRBD 9, yomwe inatulutsidwa mu 2015 ndipo sigwirizana pamlingo wa protocol. Zotsatira zake, DRBD 9 idapangidwa ngati gawo lakunja losiyana, losagwirizana ndi gawo la kernel. Kukhazikitsa kwa kernel kwa DRBD kunasungidwa padera ndipo sikuli kumbuyo kwa codebase ya DRBD yomwe ilipo pakali pano ndi zaka 10-15. Ma patches omwe akuperekedwa adapangidwa kuti athetse kusiyana kumeneku.
DRBD imalola ma drive a cluster node kuti aphatikizidwe kukhala gawo limodzi, lololera zolakwika. Kwa mapulogalamu ndi dongosolo, gawo losungirali likuwoneka ngati chipangizo chimodzi, chofanana. Ndi DRBD, ntchito zonse za disk zam'deralo zimatumizidwa kumalo ena ndikugwirizanitsa ndi ma disks a makina ena. Node imodzi ikalephera, gawo losungirako limapitilizabe kugwira ntchito pogwiritsa ntchito ma node otsala. Node yolephera ikapezekanso, dziko lake limabwezeretsedwanso momwe lilili.
Gulu lomwe limapanga malo osungiramo zinthu likhoza kukhala ndi ma node okwana 32 omwe ali mu netiweki yakomweko komanso m'malo otalikirana. malo osungira detaKugwirizanitsa m'machitidwe osungira oterewa kumachitika mu netiweki ya maukonde—data imayenda kuchokera ku node kupita ku node. Kubwerezabwereza kwa ma node kumatha kuchitika motsatizana kapena mosatsatizana. Mwachitsanzo, ma node omwe ali m'deralo amatha kugwiritsa ntchito kubwerezabwereza kotsatizana, pomwe ma node omwe ali m'malo akutali amatha kugwiritsa ntchito kubwerezabwereza kosatsatizana ndi kukakamiza kowonjezera kwa magalimoto ndi kubisa.
Nthambi ya DRBD 9 imasiyanitsidwa ndi kuchotsedwa kwa gawo loyendera, zomwe zidapangitsa kuti zikhale zotheka kukhazikitsa njira zolumikizirana osati pamwamba pa TCP/IP, komanso kugwiritsa ntchito RDMA/Infiniband. Poyerekeza ndi kugwiritsa ntchito netiweki yachikhalidwe ya IP, kuphatikiza mwayi wolowera mwachindunji ku RAM ya kompyuta ina pogwiritsa ntchito RDMA (Remote Direct Memory Access) kunawirikiza kawiri magwiridwe antchito obwerezabwereza pomwe kuchepetsa katundu wa CPU ndi 50%. Kukula kwakukulu kwa malo osungira olumikizidwa kunawonjezeka kufika pa ma node 32. DRBD 9 ilinso ndi logic yosinthidwa yogwirizanitsa ma node, njira yokonzanso yotsekera, yowonjezera chithandizo cha malo a mayina a netiweki, kusintha kwa mawonekedwe a node kutengera ntchito, ndi chithandizo cha ma commits awiri ndi kufalitsa zosintha zosatseka. 
Source: opennet.ru
