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Sun Microsystems 3 manual

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Table of contents for the manual

  • Page 1

    Sun Microsy stems, I nc. 901 San Antoni o Road Palo Alto, CA 94303 -490 0 U.S.A. 650-960- 1300 Send c omments abou t this docume nt to: docfe ed ba ck@s un .com Sun St orEdge ™ Network D ata Rep licat or 3.0 Conf igur atio n Gui de Par t No. 806-7 550-10 June 2 001 , Re vi si on A[...]

  • Page 2

    Ple as e Recycle Cop yrig ht 200 1 S un Mi cr osys tems , I nc., 901 San A nto nio Road • P alo Alto, CA 943 03 USA. All righ ts re serve d. This produ ct or document i s protected b y copyrig ht and d i s t ributed under licenses restr icting its use, copying , distribu tion, and decompil ation. No part of this pr oduct or document may be repr o[...]

  • Page 3

    iii Conten ts Preface v 1. Ove rview 1 Sun SND R So ftware Description 1 Supported Hardware and Software 3 T CP / IP C on n e cti o n H ard w are C o m po n en t s 3 Network Multipathing 4 App lic ations 5 Ar chitec tur e 5 2. C onfigura tion Consi derat ions 7 Vol um e s E ligi bl e f o r R epl ica t ion 7 Choosing V olum e Level Protection 8 Bitm[...]

  • Page 4

    iv Sun St orEd ge Ne two rk D ata R e plic at or 3 .0 Co nfi gur at ion G uid e • June 20 01 Confi g ur ing The Sun SNDR Softwar e f or Mutu al Replica tion 12 Order-Dependent Writes and Volume Set Grou ping 13 Rec ov e ry C on s ide ra tio n s 14 Fa ilin g O ve r to t h e Se co n dar y Si te 1 4 Recovering the P r imary or Secondary S ite 14 Usi[...]

  • Page 5

    v Prefa ce Th e Sun StorEdge Network Data Replicator 3.0 Configuration Guide des cr ibes the Su n StorEdge™ Ne twork Data R eplicator (Sun SNDR ) software and general informat ion about its use. This guide is intended for system admin istrators who have experience with th e Sola ris™ ope rati ng env ironm ent and relat ed disk st ora ge systems[...]

  • Page 6

    vi Sun Sto rEdge Ne t work Dat a Re pl icat o r 3 .0 Confi gur ati on Guid e • J un e 2001 Using UNIX Commands This docume nt may not contain in formation on b asic UN I X ® co mmand s and pr oc edu re s suc h as s hut tin g down th e sys tem, b ooti ng th e syst em, a nd con fi gu rin g de vice s. Re f er t o th e so ft war e do cume nta ti on [...]

  • Page 7

    Preface vi i Sh ell Promp ts Related Documenta tion Sh ell P rom pt Cs h e l l machi ne_na me % Cs h e l ls u p e r u s e r machine _name # Bour ne shel l an d Korn sh e ll $ Bo urne sh ell and Korn s hell s uper user # Appl ic ation Titl e Pa rt N umber man p age s sndra dm scmad m svadm iiadm N/A Latest information S u nS t o r E d g eN e t w o r[...]

  • Page 8

    vi ii S un S to rEd ge Ne twor k Data R epl ic ator 3. 0 C onf igu rat io n Gu id e • J une 20 01 Platform Notes : The Sun Quad Fa stEthernet D evice Driver 806-3989 Su n Enterprise 10000 Inte rDomain Netw orks User Guide 806 -4131 Syst em adm inist ra tion Su n StorEdge Instant Im age 3.0 Sy stem Adminis trator ’ s Guide 806-7677 S u nS t o r [...]

  • Page 9

    Pref ac e ix Acce ssing S un D ocumenta tion Online A broad selection of Sun system docum entation is located at: http: //www.su n.com/p roducts -n-solut ions/ha rdware/ docs A com plete set o f Solari s docum ent ation and m any o ther t itles are loca ted at: http: //docs.s un.com For the late st vers ion of r el eased storag e software docu ment[...]

  • Page 10

    x Sun St orEd g e Ne two rk D ata R e plic at or 3.0 Co nf igur atio n Guid e • J u ne 20 01[...]

  • Page 11

    1 CHAP TER 1 Ov er vi ew Cau tion – Do not install or u se the Sun StorEdge V ersion 3.0 Core and data services software on se rvers in a Su n Clust er 3.0 e nvironm ent. Th e V ersion 3.0 softw are is no t co- exist en t wit h t he Su n Clu ster 3 .0 e nv iron me nt . The V ersion 3.0 software is co -ex iste nt in the S un Clus ter 2.2 e nvi ro [...]

  • Page 12

    2 Sun S torE dge N etwo rk Dat a R epli cat or 3.0 Co nfigur at ion G uide • Ju ne 200 1 The replicat ion mode ca n be synchronous or asynchronous based as a user-selectable parameter for each Sun S N DR volume set. (Use th e sndrad m enab le comm and an d select the sync or async paramet er Us e the s ndradm -R m comm and t o change the rep lica[...]

  • Page 13

    Chapt er 1 Overv iew 3 ■ One- to-man y and mul tiho p volu me sets — The Sun SN DR sof twa r e ena ble s yo u to cre ate one-to-many and multihop volume sets. In a one-to-many volume set, you can replicate data from on e primary volume to m any secondary volume s r es i ding on one or more h osts. In a multihop se t , the secondary host volume [...]

  • Page 14

    4 Sun S torE dge N etwo rk Dat a R epli cat or 3.0 Co nfigur at ion G uide • Ju ne 200 1 Netw ork M ultip athing Network multipathing w ith failover is supporte d on h osts runnin g the Solaris 8 , Update 3 operatin g e nvironment . T his feature is pr ovide d as p art of the standard So la ris o pera ting en vir onm ent a nd is t ran spa rent t [...]

  • Page 15

    Chapt er 1 Overv iew 5 Applications The Sun SNDR softwar e provides prot ection of critical en terprise informat i on . T he following information types ar e candidates for re mot e replication: ■ Database partiti ons an d logs ■ Data tha t is importan t for busine ss con tinu ance in a d isaste r situatio n The Sun SNDR software can be l e ver[...]

  • Page 16

    6 Sun S torE dge N etwo rk Dat a R epli cat or 3.0 Co nfigur at ion G uide • Ju ne 200 1 FIGURE 1 The Sun SNDR Software Archi tecture Pr imary host Appl ication Use r Sun STE or SV Kernel S u n Stor Edg e Instant Image Sun SNDR SDBC Device dri ver NSCTL - Networ k storage contr ol mod ul e Seconda ry host Use r Sun STE or SV Ker nel S u n Stor Ed[...]

  • Page 17

    7 CHAP TER 2 Con figu ra tion C on sidera tion s V olumes Eligible for R eplication Generally , in clude the following critical volumes in the Su n SNDR configuration: ■ Datab ase and datab ase managem ent sy stem (DBM S) logs (the tota l databas e o r online DBMS log) ■ Access control fil e s Y o u c an ex clud e vol ume s f rom th e Su n SND [...]

  • Page 18

    8 Sun S torE dge N etwo rk Dat a R epli cat or 3.0 Co nfigur at ion G uide • Ju ne 200 1 Choosing V olu me L evel Pr otection In general, cu stomers s h ould pr otect their data w ith some level of RAID. W ith the Sun SNDR software, the primary volume s can be pr ot ected by any software or hardw are RAID level desi red. The prot ection lev el of[...]

  • Page 19

    Chapter 2 Config uration C onsider ations 9 If yo ur server is configured in a clust er e d environment , set th e bitmap mode to 1. I f your server is not configu r ed in a cluster ed environment, you can also choose t he bi tma p mod e sett ing of 1 to im pr ov e err or or d isa ste r rec ove ry . Choosing a Connection M edium to Link My Si tes T[...]

  • Page 20

    10 Su n S torE dg e N etwo rk Dat a Rep lic a tor 3. 0 Co nfig ura tio n Gui de • June 2 00 1 Co nfig ur ing R ed undan t Lin k s B etw een S ite s The So laris 8 operat ing envi ronmen t offers IP mul tipath ing. T his feature per mits a Solaris host to group multiple ph ysical network interfaces into a single logical inte rface . Redun dan cy b[...]

  • Page 21

    Chapter 2 Confi guration C onsider ations 11 Choo sing Betwe en Syn chronous an d Asynchr o nous Replication In synchr onous mode, a write operati on is not confirmed as complete u ntil t he re m ote volume has been u pdated. Gen erally , synchronous mi rr oring is limit ed to re lat ively short distances (that is, tens of kilomete rs) because of t[...]

  • Page 22

    12 Su n S torE dg e N etwo rk Dat a Rep lic a tor 3. 0 Co nfig ura tio n Gui de • June 2 00 1 When T o Suspend Re plication to the Secondary Sit e For many cust omers, the Sun SNDR softw are is us ed to mirr or the primary site’s information ont o the a lternate location as q uickly as possible under the con straints of distance and techn ology[...]

  • Page 23

    Chapter 2 Configu ration C onsider ations 13 Or de r -De pendent W rite s and V o lume Set Gr o uping For the Sun SNDR V e rsion 2.0 softw are, write ordering is only maintain ed by the Sun SNDR software within a logical volu me. In V ersion 3.0, write ord e ring is also maintained for gr ou ps of asynchronously replicating volume s ets. (Th e gene[...]

  • Page 24

    14 Su n S torE dg e N etwo rk Dat a Rep lic a tor 3. 0 Co nfig ura tio n Gui de • June 2 00 1 Rec ove ry Con sid erati ons Th e Sun Stor Edge Network Data R eplicator 3.0 System A dministrator ’ s Guide c ont ains information about v arious r e covery s ce narios. This section describes the following topi cs: ■ Failing Over to the Secondary S[...]

  • Page 25

    Chapter 2 Configu ration C onsider ations 15 Choosing the Resynchronization T yp e: Updat e or Fu ll Tip – If a synchronizat ion in itiated b y t he sndra dm -m or sndra dm -m -r comm ands is interrupted, use the sndrad m -m - u upd ate comm a nd to c om plete th e s ynch roniz ation. U se /usr/ opt/SUNW scm/sbi n/scmad m -S to vi ew th e sy nch [...]

  • Page 26

    16 Su n S torE dg e N etwo rk Dat a Rep lic a tor 3. 0 Co nfig ura tio n Gui de • June 2 00 1 Usin g T he Su n SN DR a nd Su n St or Edge I nsta n t Image Softwar e T o hel p ens ur e the hi ghe st le vel of da ta in teg rity o n both s ite s duri ng nor ma l operations or during data recovery , use the Sun SND R sof t ware w ith the Sun St orEd [...]

  • Page 27

    Chapter 2 Configu ration C onsider ations 17 Sun S NDR S oftw are an d Sun St or Edge Fast W rite Cache Software Note – Y ou can not use the Su n Stor Edge Fas t W rite Ca che (F WC) prod uct, inc lud ing the SUNWnvm V er sion 3. 0 softw are, in a Su n C luster en vi r onm ent be cause cache d data is inaccessible from other m achines in a cluste[...]

  • Page 28

    18 Su n S torE dg e N etwo rk Dat a Rep lic a tor 3. 0 Co nfig ura tio n Gui de • June 2 00 1 One-to-M any a nd Mu ltihop V olume S ets The Sun SNDR software enables you t o create on e -to-many and multihop vol u me sets. In a one-to-man y volume s et, you can replicate data from on e primary volu me to many secondary volumes r esiding on one or[...]

  • Page 29

    Chapter 2 Configu ration C onsider ations 19 Us ing The S un S NDR S of tware in a Fir ewa ll Environment Y o u ca n u se the S un SND R soft ware wi th a ny enh ance d net work p roduct tha t Su n off e rs. Port 121 must b e available for use b y the Sun SNDR sndr d dae mon. Y ou can u se IP m asquera ding . SND R use s conn ectio n-ori ented ser [...]

  • Page 30

    20 Su n S torE dg e N etwo rk Dat a Rep lic a tor 3. 0 Co nfig ura tio n Gui de • June 2 00 1[...]