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HP (Hewlett-Packard) AX696-96243 - page 1
HP S to r e V irtual S tor age Multi- Site C onf i gur ati o n Guide Abstract This gui de contains detailed instru ctions f or designing and implementing the Multi- Site SAN f eatures o f the LeftHand OS . The Multi-Site S AN featur es enable y ou to sy nchr onousl y and automaticall y mirror dat a between geogr aphic sites . T opics inc lude desig ...
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HP (Hewlett-Packard) AX696-96243 - page 2
© Cop yr ight 2009 , 20 1 3 He wlett-P ack ard Dev elopment Co mpany , L.P . Conf idential com puter softwar e. V alid license f rom HP r equired f or posse ssion , use or copy ing. C onsistent w ith F AR 1 2 .2 1 1 and 1 2 .2 1 2 , Comme rc ial Compu ter Softwar e, C omputer So ft war e Documen tation, and T ec hnical Data for C ommer cial Items ...
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HP (Hewlett-Packard) AX696-96243 - page 3
C onte nts 1 Designing a Multi- Site S AN.........................................................................5 Designing the ne t w ork f or the Multi-Site S AN...............................................................................5 Best pr acti ces fo r implementing the Multi-Sit e SAN ne t w ork....................................... ...
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HP (Hewlett-Packard) AX696-96243 - page 4
T o add ca pacity............................................................................................................28 R emov ing stor age s ys tems fr om a Multi-Sit e clus ter.......................................................................29 T o r emo ve the s tor age sy stems f ro m the site....................................... ...
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HP (Hewlett-Packard) AX696-96243 - page 5
1 Desi gning a Multi- Site S AN The HP S tor e V irtual Multi-Site S AN featur es ena ble you to s y nchr onou sly mirr or data be t w een sites auto matically . Y ou cr eate a Multi- Site S AN by conf igur ing equal number s of stor age s ys tems into sites in the s oftwar e. The Multi- Site S AN softw are ena bles the fo llow ing featur es: • M ...
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HP (Hewlett-Packard) AX696-96243 - page 6
• Lo w round-trip latenc y —In orde r to not impact disk I/O t o the applicatio n server , the round-tr ip latenc y bet w een the sites mu st be no mor e than 2 ms. • Redundant links —Ha ve multiple ph y sical connecti ons (media) betw een the sites f or redundanc y . The ne t w ork sho uld be confi gured so that a link failur e does no t c ...
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HP (Hewlett-Packard) AX696-96243 - page 7
Sample r ecomme nded networ k conf igur ati ons for Multi- Site S ANs This s ection pr o v ides illus trati ons of common netw ork conf igur ations f or the topologi es desc ribed in T able 1 (page 6) . T he clu sters and site s can hav e many mo re s torage s y stems than ar e depi cted in these illu str ations, w hic h foc us on the ne t w ork de ...
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HP (Hewlett-Packard) AX696-96243 - page 8
Figur e 3 T riangular network with Failo ver Manager 1 . Dual r edundant GigE links Figur e 4 Hub and spoke networ k core with redundant links out t o eac h site 1 . Cor e networ k hub and spok e 8 Designing a Multi- Site SAN ...
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HP (Hewlett-Packard) AX696-96243 - page 9
Figur e 5 Combination full-mesh core with tr iangular links to all sites 1 . F ull mesh core ne t w ork Using m ultiple subnets IMPORT ANT: Be st pr actice is to u se a single subnet in mo st cases . Y ou can use multiple su bnets with a Multi- Site S AN. Multiple su bnets let y ou hav e multiple VIP s, one VIP per subnet . T he adv antage of using ...
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HP (Hewlett-Packard) AX696-96243 - page 10
Figur e 6 M ulti- Site SAN mapping to subnets, VI P s, and application ser vers 1 . Dual r edundant GigE links Co nnecting vo lumes to multiple subnets in a Multi- Site S AN using the Mi cr os oft iS CS I initiator Connec ting to v olumes in a multiple subne t confi gurati on is similar to connecting t o volumes in a single -site conf igur ation , ...
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HP (Hewlett-Packard) AX696-96243 - page 11
Figur e 7 Entering VIP s in a Multi-Site S AN configuration 2. On the T argets t ab, s elect the v olume to log on to . 3. C lick L og On . 4. Selec t the Enable multi-path check bo x if using MP IO . Figur e 8 Logging on to v olume 5 . [Optional] If y ou w ant this volume t o be av ailable after r ebooting, s elect the Automaticall y restor e... c ...
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HP (Hewlett-Packard) AX696-96243 - page 12
Figur e 9 T arget portal value remains Def ault 8. After s etting the values , cli ck OK to c lose the Ad vanced Se ttings dialog . 9 . Clic k OK again to finish logging on . 1 0. If y ou want t o set the MPIO load balanc ing poli cy , see the HP St ore Virtual Stor age DSM f or MPIO Deplo y ment Guide . 1 1 . If you ha ve multiple NIC s, r epeat s ...
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HP (Hewlett-Packard) AX696-96243 - page 13
In addition t o setting up the Multi-Site c lust ers fo r data repli cation , it is important to se t up the S AN managers f or quor um corr ectl y to ensur e that in the ev ent of a f ailure the s y stem can be pr oper ly r ecov er ed. Maint aining quorum can be e ither an aut omated pr ocess or manuall y r ecov er ed by an Adminis trato r . T abl ...
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HP (Hewlett-Packard) AX696-96243 - page 14
Figur e 1 1 T wo ph ysical sites, logical thir d site: c luster spans two sites, Failo ver Manager in logical third site 1 . V olumes ar e conf igured w ith Netwo rk RAID- 1 0 Figur e 1 2 Thr ee phy sical sites: c luster spans three sites 1 . V olumes ar e conf igured w ith Netwo rk RAID- 1 0+1 1 4 Designing a Multi- Site SAN ...
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HP (Hewlett-Packard) AX696-96243 - page 15
Figur e 1 3 T wo ph ysical sites: cluster spans t wo sites, one site is the primary site 1 . V olumes ar e conf igured w ith Netwo rk RAID- 1 0 Bes t pr acti ces f or conf igur ing qu orum and manager s in a Multi-Sit e S AN en v ir onmen t Conf igur ing the appr opr iate number o f managers in a Multi- Site S AN on the appr opri ate stor age s ys ...
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HP (Hewlett-Packard) AX696-96243 - page 16
T able 3 Common Multi-Site S AN configurations with r ecommended manag ers Number of managers and number Needed to maintain quorum Manager configuration Multi-Site S AN configuration • Manager count = thr ee Number fo r quorum = tw o • Manager count = f iv e Number fo r quorum = thr ee F or four s torage s ys tems, run: T wo ph ysical sit es, o ...
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HP (Hewlett-Packard) AX696-96243 - page 17
T able 4 Data protection lev els and the suppor ted number of sites Number of sites supported Data protection lev el T wo Netwo rk RAID- 1 0 Thr ee NO TE: T w o sites ar e supported, bu t not consider ed a best pr actice conf igur ation . Netwo rk RAID–1 0+1 T wo NO TE: Thr ee sites ar e supported, but ar e not consi dered a best pr actice conf i ...
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HP (Hewlett-Packard) AX696-96243 - page 18
T able 5 Failur e conditions and resolutions Resolution steps Failur e condition None . The pr imar y site w ill continue to oper ate . Secondary site off line None . The pr imar y site w ill continue to oper ate . Networ k link between sites f ails Primary site o ffline 1 . If any of the s torage s ys tems running managers in the pr imary site can ...
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HP (Hewlett-Packard) AX696-96243 - page 19
T able 6 Alternati ve Multi-Site S AN configurations (continued) Details Description Alternate configur ation be Multi-Site if it is to co ntain stor age sy stems fr om differ ent subne ts. The V irtual Manager is used in two-site conf igurati ons, and is not as commo nly used The V irtual Manager capability r emains in the produc t (a manual pr oc ...
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HP (Hewlett-Packard) AX696-96243 - page 20
2 Imple menting a Multi- Site S AN After y ou ha ve de signed the Multi-Site S AN co nfigur atio n, y ou ar e read y to implemen t it. Bef or e y ou begin Install Multi- Site S AN featur e k ey s on the st orage s y stems y ou ar e going to u se . R egister y our stor age s ys tems. F or mor e inf ormati on, see “R egiste ring ad vanced f eatures ...
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HP (Hewlett-Packard) AX696-96243 - page 21
Figur e 1 4 Using the manag ement group w izar d to create a Multi-Site SAN NO TE: Y ou must ha ve at leas t one stor age s ys tem for eac h site in the A vaila ble S yst ems pool bef or e starting. Cr eating the management gr o up The f irs t par t of the w i z ard c r eates the management gr oup , w hic h includes conf igur ing the optimal number ...
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HP (Hewlett-Packard) AX696-96243 - page 22
Cr eating sites When c r eating a new site , y ou fir st cr eate the sit e and then assign s tor age sy stems t o that site: 1 . Clic k N e w to open the New Sit e windo w . 2. Ent er a name for the site and an opti onal desc ripti on. 3. [Opti onal] Mak e the site pr imar y , if appr opri ate . 4. Cli ck Add in the Site S y stems s ection and the ...
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HP (Hewlett-Packard) AX696-96243 - page 23
Figur e 1 6 Vie wing the Sites Details tab windo w C on ve r ting an e x isting S AN to a Multi-Site S AN P lan the conv ersi on accor ding to the cr iter ia des cr ibed in “Prepar ing to con vert an e x isting S AN to a Multi-Sit e SAN” (page 20) . Pr er equisite s • Upgr ade all stor age s yst ems to LeftHand O S softwar e v ersi on 7 . 0 o ...
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HP (Hewlett-Packard) AX696-96243 - page 24
1 0. Assign o ne or mor e VIP s as planned for y our site la yo ut, and the n clic k Next . The Cr eate V olume w indow opens w ith the Skip V olume Creati on box c heck ed . If yo u want to c reate a ne w v olume for y our Multi-Sit e clus ter , clear the bo x and fill in the v olume info rmation . 1 1 . Clic k N e xt to complete the w i z ar d. 1 ...
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HP (Hewlett-Packard) AX696-96243 - page 25
Best pr acti ce Install the F ailo ve r Manager on a serve r in a separat e phy sical locati on fr om the S AN sites , and then add it as a separ ate site in the manage ment gr oup . Doing so w ill pr ev ent los s of quor um in a site failur e , r egardle ss of w hich single site f ails. Adding the F ailo ve r Manager to the management gr oup and s ...
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HP (Hewlett-Packard) AX696-96243 - page 26
V ie w ing sites in the CM C T o v ie w sites in the CM C, select the Sites node in the nav igati on w indow . The Site s node is displa yed in e very management gr oup . T ypi cally , how ev er , the Sites Details tab sh ow s the stor age s ys tems as unas signed. T he site desi gnation has no e ffect ou tside of the Multi-Sit e S AN confi gurati ...
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HP (Hewlett-Packard) AX696-96243 - page 27
• Sites • Sites (Gr ouped) Designating a pr imary site Use the Pr imary designati on when y ou ar e using the Multi- Site clu ster to maint ain a primary site and a second sit e as a back up site . Designat e the site as Pr imar y whe n you c r eate the site , or y ou can edit an e xis ting site to mak e it primary . Only one sit e can be desig ...
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HP (Hewlett-Packard) AX696-96243 - page 28
1 . Select the Sites node in the na vi gation w indo w . 2. Se lect the site y ou wan t to delete in the Details ta b, r ight-cli ck , and then selec t Delete Site . NO TE: If onl y one site will be le ft in the clust er , the war ning sho wn in “Deleting a site that contains a s torage s y stem cau ses this w arning ” (page 28) is display ed . ...
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HP (Hewlett-Packard) AX696-96243 - page 29
R emo v ing sto r age s ys tems f r om a Multi-Sit e clu ster R emov ing stor age s ys tems fr om a Multi-Sit e clus ter affec ts the capacity of the c luste r and the Multi-Site co nfigur ati on. • Ensur e that the capac it y r emaining after y ou r emov e the stor age s ys tem(s) is suffi c ient f or the data on the v olumes . • T o main tain ...
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HP (Hewlett-Packard) AX696-96243 - page 30
3 Suppo r t and other r es our ce s C ontac ting HP F or w orld wi de techni cal support info rmation , see the HP suppo r t w ebsite: http://www .hp .com/support Bef or e contacting HP , collect the f ollow ing inf ormati on: • Pr oduct model names and n umbers • T ec hnical support r egistr ation n umber (if applicable) • Pr oduct ser ial n ...
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HP (Hewlett-Packard) AX696-96243 - page 31
initiate a f ast and acc ur ate re soluti on, bas ed on yo ur produc t’s serv ice le vel . Notif ications ma y be sent t o your a uthor iz ed HP Channel P ar tner f or on -site se r v ice , if confi gured and a vaila ble in your country . The so ft w are is a vailable in tw o var iants: • HP Insigh t Remote Su pport Standar d: This s oft w are ...
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HP (Hewlett-Packard) AX696-96243 - page 32
4 Doc umen tati on f eedbac k HP is committed to pr o vi ding documen tation that meets y our needs . T o help u s impr ov e the doc umentatio n, send an y er ro rs, sugge stions , or comments to Doc umentati on F eedback ( docsfeedback@hp.com ). Include the doc ument title and part number , ver sion n umber , or the URL whe n submitting your f eed ...
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HP (Hewlett-Packard) AX696-96243 - page 33
Glos sary The f ollo w ing glossary pr ov ides de finiti ons of ter ms used in the L eftHand OS so ft war e and the HP Sto re Virtual St orage . acting primary volume The r emote v olume , when it as sumes the r ole of the primary v olume in a failo ver sce nario . Active-P assiv e A t y pe of networ k bonding whi ch , in the ev ent of a NIC f ailu ...
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HP (Hewlett-Packard) AX696-96243 - page 34
DSM De vi ce Spec ifi c Module. DSM f or MPIO The HP S tor e V ir tual DSM f or Mic r osoft MP IO vendor -spec ifi c DSM that inte rfaces w ith the Mic ro soft MPIO f rame w ork. failback After f ailov er , the proce ss by w hic h you r est ore the pr imary volume and turn the ac ting primary back in to a remo te volume . failo ver The pr oces s by ...
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HP (Hewlett-Packard) AX696-96243 - page 35
MIB Management infor mation bas e. A data base of managed obj ects accessed b y netwo rk management pr otocols. A n SNMP MIB is a set of par ameter s that an SNMP management s tation can query or set in the S NMP agent of a netw ork de vi ce (for e xam ple, a r outer ). Multi-Site cluster A clu ster of st orage that spans multiple sites (u p to thr ...
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HP (Hewlett-Packard) AX696-96243 - page 36
RAI D rebuild r ate The r ate at w hich the RAID conf igurati on r ebuilds if a disk is replaced . RAI D status C ondition o f R AID on the stor age s yst em: • Normal - RAID is s ync hroni z ed and running . No acti on is req uired . • Rebuild - A ne w disk has been ins erted in a dri ve ba y and RAID is curr entl y rebuilding . No acti on is ...
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HP (Hewlett-Packard) AX696-96243 - page 37
site A user -desi gnated location in w hic h stor age sy stems ar e installed . Multi-Site S AN conf igur ations hav e multiple sites w ith sto rage s ys tems in each site , and eac h site has its ow n subnet . A site can be a logical conf igur ation , such as a su bnet within the same data cent er , depar tment , or applicati on. SmartClone volume ...
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HP (Hewlett-Packard) AX696-96243 - page 38
volume si ze T he siz e of the virtual de vi ce communicated to the ope rating s ys tem and the applicati ons. VSS Pr ov ider HP Sto re Virtual VS S Pro v ider is the har dw are pr ov ider that su pports the V olume Shado w Cop y Serv ice on the HP Stor e Virtual Stor age . VSS V olume Shado w Copy S er v ice writable space See tem porary space . 3 ...
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HP (Hewlett-Packard) AX696-96243 - page 39
Inde x S y mbols 2 -site conf igur ations pr imar y site designati on in, 1 7 A adding additional ca pacity to e xisting sit es, 2 8 site , 2 7 stor age s yst ems to Multi-Site c luster , 28 alter nativ e Multi-Site S AN conf igur ations, 1 8 applicati on clu sters setting up in a Multi- Site SAN e nv iro nment, 1 7 applicati on serve r connecting ...
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HP (Hewlett-Packard) AX696-96243 - page 40
fo r sites, 2 6 MPIO and m ultiple subnets, 1 2 Multi-Site c luste r cr eating , 2 1 r emov ing stor age s yst ems fr om, 2 9 w iz ar d, 2 3 Multi-Site S AN alter nativ e confi gurati ons, 1 8 common conf igur ations w ith reco mmended Failo v er Manager , 1 5 common netw ork desi gns, 6 con verting fr om an e xisting S AN , 2 3 implementing , 20 i ...
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