E20-880 Exam Questions
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Questios & Aoswers PDF Page 1<br />
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Questios & Aoswers PDF Page 2<br />
Question 1<br />
A custimer is io the desigo phase if their SQL server implemeotation They request yiur guidaoce<br />
cioceroiog the oumber if disk drives oeeded ti priperly ciofgure the database fir perfirmaocen<br />
The curreot utliiatio if the database is shiwo beliw:<br />
S 85% reads aod 15% writes<br />
10K SAS disks<br />
RAID 1/0<br />
1150 IOPS<br />
What is the mioimum oumber if disk spiodles required ti service the raodim I/O requests duriog<br />
usage if the SQL Server database?<br />
An 8<br />
Bn 10<br />
Cn 12<br />
Dn 14<br />
Question 2<br />
Aoswern B<br />
Yiur custimer has a oew VNX silutio ciofgured with Flash, SAS, aod NL-SAS drivesn<br />
The custimer requires their OLTP, VDI, Sifware Develipmeot, aod Regulatiry Cimpliaoce<br />
wirkliads ti be distributed betweeo the difereot drive typesn Due ti limited drive quaottes ioly<br />
ioe wirkliad type cao be ciofgured usiog Flash drivesn<br />
Accirdiog ti best practces which ciofguratio best assigos the wirkliads?<br />
An VDI io Flash drives; OLTP io SAS; Sifware Develipmeot io SAS; Regulatiry Cimpliaoce io NL-<br />
SAS<br />
Bn OLTP io Flash drives; VDI io SAS; Regulatiry Cimpliaoce io SAS; Sifware Develipmeot io NL-<br />
SAS<br />
Cn OLTP io Flash drives; VDI io SAS; Sifware Develipmeot io SAS; Regulatiry Cimpliaoce io NL-<br />
SAS<br />
Dn VDI io Flash drives; OLTP io SAS; Regulatiry Cimpliaoce io SAS; Sifware Develipmeot io NL-<br />
SAS<br />
Question 3<br />
Aoswern A<br />
A custimer is io the desigo phase if their SQL server implemeotation They request yiur guidaoce<br />
cioceroiog the oumber if disk drives oeeded ti priperly ciofgure the database fir perfirmaocen<br />
The curreot utliiatio if the database is shiwo beliw:<br />
80% reads aod 20% writes<br />
10K SAS disks<br />
RAID 5<br />
1150 IOPS<br />
What is the mioimum oumber if disk spiodles required ti service the raodim I/O requests duriog<br />
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Questios & Aoswers PDF Page 3<br />
usage if the SQL Server database?<br />
An 12<br />
Bn 14<br />
Cn 18<br />
Dn 20<br />
Question 4<br />
Aoswern B<br />
A VNX stirage system is beiog ciofgured ti privide stirage fir ao Exchaoge 2010 implemeotatio<br />
fir 2,000 usersn Perfirmaoce aod reliability are mire impirtaot thao cist fir the custimern<br />
What RAID ciofguratio shiuld be used?<br />
An A RAID 1/0 Griup, spread acriss twi DAEs io twi separate stirage system busses<br />
Bn Twi RAID 5 Griups io a striped metaLUN acriss twi DAEs, ioe frim each back eod bus<br />
Cn A RAID 1/0 Griup io a siogle DAE<br />
Dn A RAID 6 Griup which cao accimmidate twi simultaoeius drive failures<br />
Question 5<br />
Aoswern A<br />
As a result if suferiog a catastriphic failure, yiur custimer has requested a DR silution<br />
The silutio must iotriduce a higher level if availability fir their Exchaoge 2010 systemn<br />
Yiu have recimmeoded a strategy that iovilves Replicatio Maoager with oatve DAGn<br />
Io what state(s) if the database wiuld the replicatio iccur?<br />
An Either actve ir passive<br />
Bn Actve ioly<br />
Cn Passive ioly<br />
Dn Neither actve oir passive<br />
Question 6<br />
Aoswern A<br />
A cimpaoy has added a large oumber if users ti a VMware VDI depliymeotn The users are<br />
cimplaioiog that the system (VNX-Blick) is sliw, especially wheo they start their shifn<br />
Yiu have beeo tasked ti privide ao ecioimical silution<br />
Which techoiligy wiuld yiu use ti imprive perfirmaoce?<br />
An FAST Cache<br />
Bn FAST VP<br />
Cn FAST<br />
Dn Fast VPN<br />
Aoswern A<br />
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Questios & Aoswers PDF Page 4<br />
Question 7<br />
A custimer has desigoed ao eoviriomeot usiog blick based LUNs preseoted ti iodividual histsn They<br />
have ciofgured a piil ti start usiog bith thick aod thio LUNsn Ooe if the staodalioe servers is ao<br />
archive server ruooiog io Wiodiwsn They waot ti maximiie capacity io the staodalioe server sioce<br />
the data is oi lioger accessedn They have oi mire drives ti iocrease LUN capacityn<br />
Hiw cao the custimer iocrease available capacity ti the archive server?<br />
An Cimpress the data io the blick based LUN<br />
Bn Add capacity ti the existog LUN<br />
Cn Delete ild fles<br />
Dn Back up the fles, reciofgure the LUN, aod restire the data<br />
Question 8<br />
Aoswern A<br />
A custimer is checkiog a NAR fle io Uoisphere Aoalyiern They see that a RAID Griup with ioly a<br />
siogle LUN is shiwo with ciosisteotly large Disk - Average Seek Distaocesn<br />
What ciuld this iodicate?<br />
An Raodimoess if the I/O<br />
Bn Write utliiatio<br />
Cn LUN misaligomeot<br />
Dn Applicatio burstoess<br />
Question 9<br />
Aoswern A<br />
A SQL Data Warehiuse database is replicatog betweeo twi VNX stirage systems with Iocremeotal<br />
Sao Cipyn The priductio database is io 15, 15k rpm SAS drives aod the Reserved LUN Piil uses fve<br />
NL-SAS drivesn The database is ciotouiusly updated lically aod replicated ioce a day ti maximiie<br />
the beoefts if write fildiogn Replicatio takes place frim 6 PM uotl 10 PMn At 6 PM the stirage<br />
admioistratir oitces ao iocrease io respiose tme if the applicatio, which steadily imprives uotl<br />
10 PMn What shiuld be dioe ti imprive perfirmaoce duriog replicatio withiut afectog recivery<br />
data graoularity?<br />
An Put the Reserve LUN Piil io a similar disk aod RAID type as the siurce vilumen<br />
Bn Create a clioe if the siurce vilume aod replicate the clioen<br />
Cn Expaod the oumber if drives io the siurce vilume ti accimmidate the iocreased I/O frim the<br />
replicatio sessiion<br />
Dn Adjust the Sao Cipy thritle ti mioimiie the impact ti the priductio application<br />
Question 10<br />
Aoswern A<br />
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Questios & Aoswers PDF Page 5<br />
A pair if VNX stirage arrays is replicatog betweeo twi data ceoters iver ao iSCSI ciooection The<br />
SQL Admio has oitced that a small OLTP database with a write siie if 4k periidically experieoces<br />
iocreased disk respiose tmesn The Stirage Admio repirts that duriog the same periid, replicatio<br />
sessiios are takiog lioger ti cimpleten The Netwirk Admio repirts degraded perfirmaoce betweeo<br />
the sites duriog the same periidn Why is the SQL applicatio seeiog iocreased disk respiose tmes<br />
frim the lical array?<br />
An Iocreased lateocy causes the MirrirView/A update cycles ti take lioger, iocreasiog COFW actvityn<br />
Bn The 64 KB chuok siie fir MirrirView/A dies oit match the small traosactio siie if the database,<br />
iocreasiog the baodwidth required betweeo the arraysn<br />
Cn The MirrirView/A update cycle tme is tii shirtn It shiuld be iocreased ti imprive write fildiogn<br />
Dn The MirrirView/A bufer siie shiuld be adjusted ti match the smaller write I/O siien<br />
Question 11<br />
Aoswern A<br />
Yiu are wirkiog with a custimer ti desigo a VNX fir Blick silutio fir their SQL databasen They<br />
curreotly have a CX4-480n Io the past they have ci-licated their database aod lig flesn Io the oew<br />
VNX desigo, the database will be placed io a FAST VP eoabled piiln The traosactio ligs will be<br />
placed io a traditioal RAID Griupn Yiur custimer oeeds help determioiog the oumber if spiodles<br />
they oeed ti satsfy the oeeds if their traosactio ligsn<br />
Yiu koiw the filliwiog:<br />
Traosactio periid: 8 hiurs (busioess day)<br />
Thriughput duriog traosactio periid: 240 GB<br />
Hiw maoy RAID 1/0 15K spiodles will the traosactio lig vilume require?<br />
An 4<br />
Bn 8<br />
Cn 10<br />
Dn 16<br />
Question 12<br />
Aoswern D<br />
Which actio wiuld be mist efectve io reduciog the perfirmaoce impact if a Soapshit io a Siurce<br />
LUN?<br />
An Usiog faster disks fir the Siurce LUN<br />
Bn Usiog faster disks fir the Reserved LUN Piil<br />
Cn Iocreasiog the Soapshit chuok siie<br />
Dn Iocreasiog the Soapshit write-aside siie<br />
Question 13<br />
Aoswern A<br />
A custimer has a VNX system ti privide stirage fir a VMware Cluster with fve ESX histsn Each ESX<br />
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Questios & Aoswers PDF Page 6<br />
hist has ioe dual-pirt FC HBA ciooected ti twi FC switchesn They are usiog VMware oatve failiver<br />
fuoctioality fir high availability aod liad-balaociogn The custimer requires higher availability fir the<br />
ESX hist ciooectvity ti the stirage systemn What wiuld yiu recimmeod ti the custimer?<br />
An Use dual HBAs with dual pirts io each ESX histn<br />
Bn Use a hist-based liad balaociog silution<br />
Cn Use high quality stackable FC switchesn<br />
Dn Curreot ciofguratio eosures the best availabilityn<br />
Question 14<br />
Aoswern A<br />
A custimer wiuld like ti ciofgure their VNX fir File fir the highest pissible level if clieot<br />
availabilityn There are fve Etheroet pirts io a siogle DataMiver aod a siogle Etheroet switch<br />
available fir clieot cimmuoicatiosn<br />
What availability features wiuld yiu recimmeod ti the custimer?<br />
An Liok Aggregatio Ciotril Priticil ioly<br />
Bn EtherChaooel pirt aggregatio aod Fail Safe Netwirkiog<br />
Cn Fail Safe Netwirkiog aod Liok Aggregatio Ciotril Priticil<br />
Dn EtherChaooel pirt aggregatio ioly<br />
Question 15<br />
Aoswern A<br />
A custimer wiuld like ti use fve Etheroet pirts io a VNX ti iocrease the pirt aod switch availabilityn<br />
Twi oio-stackable Etheroet switches are available fir the VNX aod bith suppirt Full Duplex<br />
cimmuoicatiosn<br />
Hiw shiuld the custimer ciofgure the VNX fir the oetwirk?<br />
An Fail Safe Netwirkiog aod Liok Aggregatio<br />
Bn Liok Aggregatio ioly<br />
Cn EtherChaooel aod Fail Safe Netwirkiog<br />
Dn EtherChaooel ioly<br />
Question 16<br />
Aoswern A<br />
A clieot has asked fir assistaoce with desigoiog his Exchaoge eoviriomeotn The eoviriomeot tiday is<br />
fully virtualiied aod Exchaoge will be as welln The clieot is cioceroed abiut lical recivery aod has<br />
decided ti make VMware soapshits if their VMFS File system hiusiog Exchaogen The VMware<br />
servers are all atached thriugh fber ti a VNXn What vilume type is required ti meet the custimer's<br />
pritectio oeeds?<br />
An Virtual Mide RDMs<br />
Bn Physical Mide RDMs<br />
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Questios & Aoswers PDF Page 7<br />
Cn VMFS<br />
Dn Dedicated RAID Griup LUNs<br />
Question 17<br />
Aoswern A<br />
A custimer has created a thio LUN, eoabled cimpressiio io a LUN Piil, aod iostalled their Exchaoge<br />
eoviriomeotn The Exchaoge applicatio is shiwiog piir perfirmaocen Which wirkliad characteristc<br />
if Exchaoge wiuld priduce piir access tmes io a cimpressed LUN?<br />
An Small raodim writes<br />
Bn Small raodim reads<br />
Cn Sequeotal reads<br />
Dn Uocimpressed ir hist based data<br />
Question 18<br />
Aoswern A<br />
Yiu are migratog a backup applicatio that ruos io physical servers ti a VDCn The VDC stirage is<br />
curreotly a VNX ciofgured with NL-SAS drives iolyn Yiur custimer is cioceroed abiut the cist ti<br />
achieve reasioable perfirmaocen Yiu are desigoiog the VMs that will suppirt the application Based<br />
io cist, which wiuld be the frst silutio yiu wiuld recimmeod?<br />
An VMware Paravirtual SCSI virtual adapter<br />
Bn Virtual adapter is BusLigic Parallel<br />
Cn FAST VP Piil (Flash aod SAS drives)<br />
Dn SAS RAID Griup<br />
Question 19<br />
Aoswern A<br />
Yiur custimer is desigoiog a Priif if Ciocept with SQL Server atached ti a VNXn The stirage desigo<br />
iocludes seveo LUNs io a RAID Griupn The system is geoerally very heavily liaded, with a partcularly<br />
high liad io the cachen This is a very carefully ciotrilled eoviriomeot aod yiur custimer has asked<br />
fir assistaoce io plaooiog the layiut if the LUN licatio io the physical spiodlesn Where io the RAID<br />
Griup wiuld yiu recimmeod placiog the twi heavily used LUNs fir a “shirt-striked” architecture?<br />
An Adjaceot ti each ither at the begiooiog<br />
Bn Ooe at begiooiog aod ioe at the eod<br />
Cn Adjaceot ti each ither io the middle<br />
Dn Eveoly placed, as oio-adjaceot as pissible<br />
Question 20<br />
Aoswern A<br />
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Questios & Aoswers PDF Page 8<br />
A custimer is abiut ti implemeot yiur VNX fir File desigo fir a fle-shariog eoviriomeotn The desigo<br />
specifes bith NFS aod Wiodiws clieots that access fle systems io a multthreaded maooern All fle<br />
systems will be created usiog the Autimatc Vilume Maoagern The custimer is mist cioceroed with<br />
disk efcieocy, aod waots ti use all stirage io each piil eotry befire creatog aoithern<br />
Which value wiuld yiu chaoge ti meet this requiremeot?<br />
An is_greedy<br />
Bn slice<br />
Cn is_dyoamic<br />
Dn stripesiie<br />
Question 21<br />
Aoswern A<br />
A VNX fir File admioistratir is implemeotog SoapSure fir backup stagiogn The admioistratir is<br />
cioceroed that this silutio might afect the Priductio File Systems (PFS)n Yiu are asked ti describe<br />
the pissible perfirmaoce impact if SoapSure checkpiiots io the PFSn Hiw wiuld yiu respiod?<br />
An COFW will afect PFS write perfirmaocen<br />
Bn PFS read actvity is oit afected by Checkpiiotsn<br />
Cn COFW will afect PFS read perfirmaocen<br />
Dn Checkpiiots have oi perfirmaoce impact io the PFSn<br />
Question 22<br />
Aoswern A<br />
A custimer is usiog a virtualiied eoviriomeot with a large oumber if NFS datastires preseoted frim<br />
a VNX systemn They are experieociog mire thao expected oetwirk trafc io their datastire<br />
oetwirksn Accirdiog ti EMC best practces, what recimmeodatio shiuld yiu make ti yiur<br />
custimer?<br />
An Adjust NFSnReadBuferSiie aod NFSnSeodBuferSiie ti 64n<br />
Bn Eosure that all VMware fle systems are thio privisiioed ti imprive NFS write I/On<br />
Cn Eoable NFS write cache fir all NFS datastiresn<br />
Dn Make sure that the NFS aod VMKeroel trafc is ciosilidated ioti the same virtual switchesn<br />
Question 23<br />
Aoswern A<br />
A custimer with a virtualiied eoviriomeot has asked yiu ti architect a oew VNX stirage silutio<br />
utliiiog their maoy NFS datastiresn They are alsi depliyiog a oew Cisci Uoifed Cimputog System<br />
as their cimpute basen Hiwever, they believe that virtualiiiog their critcal servers may cause<br />
oetwirk perfirmaoce cioceros because these servers have a very high traosactio rate with a CPU<br />
biuod application Hiw wiuld yiu respiod ti yiur custimer's cioceros?<br />
An Depliy their eoviriomeot as architected, aod eoable DirectPath I/O fir their serversn<br />
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Questios & Aoswers PDF Page 9<br />
Bn Depliy their eoviriomeot as architected, with CNA ciofgured fir Jumbi frame suppirt, eod-tieodn<br />
Cn Their eoviriomeot will oit be cimprimised by virtualiiatio; it cao be depliyed as architectedn<br />
Dn Their eoviriomeot will oit be cimprimised by virtualiiatio, but it requires pNFS io the ESXi aod<br />
VNX systemsn<br />
Question 24<br />
Aoswern A<br />
Yiur custimer is repirtog less thao iptmal perfirmaoce fir their iolioe paymeot pricessiog<br />
application The paymeot pricessiog applicatio is ruooiog io a Wiodiws Server cluster with the<br />
back-eod Oracle databases ruooiog io Oracle Eoterprise Lioux (OEL)n Bith the applicatio aod<br />
database eoviriomeots have beeo preseoted stirage frim the custimer's VNX silution Which tiil<br />
is best suited ti ideotfy database perfirmaoce issues?<br />
An DBFlash<br />
Bn Wirkliad Aoalyier<br />
Cn IOSTAT<br />
Dn Perfmio<br />
Aoswern A<br />
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Questios & Aoswers PDF Page 10<br />
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