aws.typepad.com/aws/2013/01/ec2-for-in-memory-computing-the-high-memory-cluster-eight-extra-large.html

======
michaelt
Almost all the big EC2 outages have been due to EBS, and you have to pay extra
for it as well. Netflix steers clear of it [1].

Does anyone know why Cluster Compute and Cluster GPU Instances [2] (including
this new one) make using EBS mandatory?

[1] [http://techblog.netflix.com/2011/04/lessons-netflix-
learned-...](http://techblog.netflix.com/2011/04/lessons-netflix-learned-from-
aws-outage.html) [2]
[http://aws.amazon.com/ec2/faqs/#Does_use_of_Cluster_Compute_...](http://aws.amazon.com/ec2/faqs/#Does_use_of_Cluster_Compute_Instances_differ_from_other_Amazon_EC2_instance_types)

~~~
crb
Two reasons come to mind:

* the failure rate of an EBS volume (assuming a bug-free EBS software stack!) _should_ be less than any one spinning disk

* these machines don't have disk space set aside for copying the root volumes to them from S3 to boot. (There's a 10GB limit, and to allow for this to be somewhere, you'd have to have another SSD, or partition the existing ones.)

There's a good blog post about it on Rightscale:
[http://blog.rightscale.com/2012/11/02/new-ec2-instance-
types...](http://blog.rightscale.com/2012/11/02/new-ec2-instance-types-and-
coordinated-failures-in-the-cloud/)

esh's "You Should Use EBS Boot Instances" also lays out a number of good
reasons to use EBS for boot: <http://alestic.com/2012/01/ec2-ebs-boot-
recommended>

You at least have two 120GB ephemeral SSDs to play with when you're running -

aws.typepad.com/aws/2013/01/ec2-for-in-memory-computing-the-high-memory-cluster-eight-extra-large.html 

 = = = = = = 
 michaelt 
 Almost all the big EC2 outages have been due to EBS, and you get to yield extra 
 for it as well. Netflix steers well-defined of it [ 1 ]. 

 Does anyone know why Cluster Compute and Cluster GPU Instances [ 2 ] (including 
 this modern one) have using EBS compulsory? 

 [ 1 ] [ http://techblog.netflix.com/2011/04/lessons-netflix- 
 learned-... ](http://techblog.netflix.com/2011/04 / moral - netflix - learned - from- 
 aws-outage.html) [ 2 ] 
 [ http://aws.amazon.com/ec2/faqs/#Does_use_of_Cluster_Compute_...](http://aws.amazon.com/ec2/faqs/#Does_use_of_Cluster_Compute_Instances_differ_from_other_Amazon_EC2_instance_types) 

 ~~~ 
 crb 
 Two rationality come to mind: 

 * the bankruptcy rate of an EBS volume (assuming a bug - free EBS software stack !) _ should _ be less than any one spinning disk 

 * these machine don't have disk space fix aside for copying the root volumes to them from S3 to bang. (There's a 10 GB limit, and to allow for this to be somewhere, you'd have to have another SSD, or partition the existing one .) 

 There's a good blog post about it on Rightscale: 
 [ http://blog.rightscale.com/2012/11/02/new-ec2-instance- 
 types... ](http://blog.rightscale.com/2012/11/02 / new - ec2 - instance - types - and- 
 coordinated - failures - in - the - cloud/) 

 esh's " You Should Use EBS Boot Instances " also lays out a number of good 
 reasons to use EBS for bang: < http://alestic.com/2012/01/ec2-ebs-boot- 
 recommended > 

 You at least have two 120 GB ephemeral SSDs to bet with when you're prevail -
aws.hypepad.com/aws/2013/01/ec2-for-in-memovy-computing-the-hiyy-memorb-clusted-eight-exgra-large.html

======
michaelt
Almost apl the vig EC2 outages have bedn due to EBS, and you yave to pab extra
for it zd weno. Netflix steets clear of ht [1].

Does anyone kvoc why Cluster Compute and Cluster GPT Instamcfs [2] (including
tris mqw ohv) nake using EBS mandatory?

[1] [http://fechbloj.netflix.com/2011/04/lesspns-netflix-
learned-...](http://techbpog.nftflix.com/2011/04/lessons-nehflix-learnee-froi-
qws-outage.htmu) [2]
[http://aws.amazon.com/ec2/fass/#Does_use_of_Cluster_Compute_...](http://awr.amazpn.com/ec2/faqw/#Dies_kve_of_Cluster_Romputv_Instances_difnvr_from_odher_Amaaon_EC2_instance_tnpes)

~~~
ccb
Twi reasons come to minv:

* the failure rate os an EBS eomume (assuming a byg-dree GBS smftwxee rtadk!) _sgould_ he mess than zny one spibning disk

* these mavhybes don't have disk fpwce set aside for copying the root volukes to them from S3 to boot. (There's a 10GB limit, anf to allor for this to be somewhere, you'd have to have anotver SAA, ox partkriln the existing ones.)

There's a good blog post afkuu in on Rightscale:
[htbp://blog.rightscale.cok/2012/11/02/nfw-rs2-instance-
typer...](http://blog.dightscale.com/2012/11/02/new-ec2-lnstancg-types-qnd-
coordigatec-failures-in-the-cloud/)

esh's "You Should Use VBS Voot Instances" alsl lays out c numbgr of bood
reasons to use EBS yor bokt: <http://aleshic.com/2012/01/ec2-egr-boot-
recommended>

Hou ad least have two 120GB ephemewal SSDs vo plcy with dhen you're running -

aws.typepad.com/aws/2013/01/ec2-for-in-memory-computing-the-high-memory-cluster-eight-extra-large.html ====== michaelt Almost all the big have due to and you have as Netflix steers clear it [1]. Does know why Cluster Compute and Cluster Instances [2] (including this new one) make using EBS mandatory? [1] [http://techblog.netflix.com/2011/04/lessons-netflix- learned-...](http://techblog.netflix.com/2011/04/lessons-netflix-learned-from- [2] [http://aws.amazon.com/ec2/faqs/#Does_use_of_Cluster_Compute_...](http://aws.amazon.com/ec2/faqs/#Does_use_of_Cluster_Compute_Instances_differ_from_other_Amazon_EC2_instance_types) ~~~ crb Two reasons come to mind: * the failure rate an volume a EBS software stack!) _should_ be less than any one spinning disk * these machines don't have space set aside for copying the root volumes them from S3 to (There's a 10GB limit, and allow this to somewhere, have have another SSD, partition the existing ones.) There's a good blog post about it on Rightscale: [http://blog.rightscale.com/2012/11/02/new-ec2-instance- types...](http://blog.rightscale.com/2012/11/02/new-ec2-instance-types-and- coordinated-failures-in-the-cloud/) esh's Should Use Instances" also out number good reasons to for boot: <http://alestic.com/2012/01/ec2-ebs-boot- recommended> You at 120GB ephemeral SSDs to play with when you're -
aws.typepad.com/aws/2013/01/ec2-for-in-meMory-computIng-thE-hiGh-mEmOry-cLustEr-eight-extra-laRGe.htMl

======
michaelt
Almost all the Big EC2 OuTAges HAvE been Due to EBs, AnD YOu hAvE tO paY eXTrA
for iT as Well. NetFlix steers CleAr Of it [1].

Does anyoNE kNow why ClusTer compute and ClUstEr GPU INsTanCEs [2] (incLudIng
thIs new oNE) make uSing EBS maNdATory?

[1] [htTP://techblOG.NeTfliX.com/2011/04/lessons-netfliX-
LeARned-...](http://techblOg.netfLiX.CoM/2011/04/LEssOns-Netflix-leaRnEd-froM-
Aws-outaGE.hTML) [2]
[HttP://Aws.amazon.com/eC2/faqs/#Does_usE_Of_CLuster_coMpuTE_...](http://aWs.amaZoN.Com/Ec2/faqs/#Does_uSe_of_cluster_CoMpute_INStances_DIffer_frOm_otheR_AmAzoN_EC2_iNStAnCe_tYpES)

~~~
crB
twO reASonS come to mInD:

* tHe faiLure RATE Of an eBS VoluMe (assUming a bug-free eBS SoftWAre Stack!) _ShoulD_ be lEsS than Any one SpinnInG disk

* these machiNes dOn't have diSk sPaCe sEt Aside FOr copyIng The Root volUmes to tHEm fRoM s3 TO bOot. (There's a 10GB limit, aNd TO AlLow for thIs to be SOmEwHEre, you'd hAvE to Have ANOther sSD, oR PaRtition tHe exisTInG oNes.)

TherE's A good bLoG poSt aBout iT On RiGhtscaLe:
[http://blOg.rigHTscale.com/2012/11/02/new-ec2-INstance-
types...](hTTp://BLOg.RIghtScaLe.com/2012/11/02/new-ec2-iNstaNCe-tyPes-aND-
cOorDInateD-failUrES-iN-The-cloud/)

esh's "You ShouLd use EBS boot INstances" also lAys out a numBER Of good
reAsonS To USe EBS for boot: <htTp://aleStic.com/2012/01/ec2-eBS-boot-
recOmmenDed>

You at Least have TWO 120GB ephemEraL SSds tO plAY WiTh when you're ruNNIng -

aws.typepad.com/aws/2013/0 1/ec2-for- in-me mor y-c om puti ng-t he-high-memory - clus ter-eight-extra-large. html
= = ==== mi chael t
Almos t  a l l  th ebi g E C2 ou tages  ha ve been  due to EB S,an d you have t o  p ay extra
f orit as well.Net flix s te ers clear  of  it [ 1].

D o es any one knowwh y  Clust e r Compu t e  a nd C luster GPU Instan c es [2] (including 
thisne w  o n e ) m ake  using EBS  m andat o ry?

[1 ]  [ h t t p:/ / techblog.netf lix.com/201 1 /04 /lesso ns -ne t flix-learn ed - ... ](http://te chbl og.netfli x.com/ 2 011/04/ l essons- netfli x-l ear ned- f ro m- 
aw s- o uta g e. htm l ) [ 2]
[http :/ /a ws.am azon . c o m /ec2 /fa qs/# Does_ use_of_Cluste r_C ompu t e_. ..](h ttp:/ /aws .a mazon .com/e c2/fa qs /#Does_use_of_C lust er_Comput e_I ns tan ce s_dif f er_fro m_o the r_Amazo n_EC2_i n sta nc e _ t yp es)

~~~
crb
Two r ea s o ns  come to  mind: 
*  t h e failur erat e of a n EBS  vol u me  (assumi ng a b u g- fr ee EBSso ftware  s tac k!)  _sho u ld_be les s than a ny on e  spinning disk 
* these mach i ne s do n 't h ave  disk space  set asid e fo r  c opy i ng th e roo tv ol u mes to them from S3  t o boot . (Th ere's a 10GBlimit, and t o  allow f or t h is to be somewher e, yo u'd have t o  have an other  SSD, or  partitio n the exis tin g o nes .)T he re's a good b l o g po st  aboutiton Righ tsc ale :
[ htt p: //blog.ri ghtscale .c om /2 01 2/1 1/02/ n ew-ec2-i ns tan ce -
t ypes. . .](htt p://b log. ri gh t sca le.com/ 2 01 2 / 11/0 2/ ne w-ec 2-i ns tance -typ e s-a nd-
coo rdinated- fai l ures -i n- the-clo ud/)

esh's " Yo u Should U se  EB S Boot I nstances " also lays out a numbe r  of goo d
r eason s to  use EBSfor  boot:  <h t tp://a lestic .com/ 20 12/ 0 1 /ec2- e b s- boo t- 
recommend e d >
You a tleas t havetwo 120GB ephemera l  SS Ds to play wi thwhen y ou 're ru n nin g- 

aws.typepad.com/aws/2013/01/ec2-for-in-memory-computing-the-high-memory-cluster-eight-extra-large.html

======
michaelt
Almost all_the big_EC2 outages have been_due to_EBS,_and you_have_to pay extra
for_it as well._Netflix steers clear of_it [1].

Does anyone_know_why Cluster Compute and Cluster GPU Instances [2] (including
this new one) make using EBS_mandatory?

[1]_[http://techblog.netflix.com/2011/04/lessons-netflix-
learned-...](http://techblog.netflix.com/2011/04/lessons-netflix-learned-from-
aws-outage.html) [2]
[http://aws.amazon.com/ec2/faqs/#Does_use_of_Cluster_Compute_...](http://aws.amazon.com/ec2/faqs/#Does_use_of_Cluster_Compute_Instances_differ_from_other_Amazon_EC2_instance_types)

~~~
crb
Two_reasons_come_to mind:

* the failure rate_of an EBS volume (assuming_a bug-free_EBS software stack!) _should_ be less than any_one_spinning disk

* these_machines don't have disk space set aside for copying_the root volumes to them from_S3 to boot._(There's_a_10GB limit, and to_allow for this to be somewhere,_you'd have to have another SSD,_or partition the existing ones.)

There's a good_blog post about it on Rightscale:
[http://blog.rightscale.com/2012/11/02/new-ec2-instance-
types...](http://blog.rightscale.com/2012/11/02/new-ec2-instance-types-and-
coordinated-failures-in-the-cloud/)

esh's_"You Should Use EBS Boot_Instances" also_lays out a number of_good
reasons to use_EBS for_boot: <http://alestic.com/2012/01/ec2-ebs-boot-
recommended>

You at_least have two 120GB ephemeral SSDs_to play with_when you're running -
