ADSM-L

Re: [ADSM-L] VMWARE VMDK size limit

2014-11-13 11:31:46
Subject: Re: [ADSM-L] VMWARE VMDK size limit
From: Tuncel Mutlu (BT İşletim ve Teknik Destek Bölümü) <Tuncel.Mutlu AT AKBANK DOT COM>
To: ADSM-L AT VM.MARIST DOT EDU
Date: Thu, 13 Nov 2014 16:25:36 +0000
After comminicating with local and remote IBM teams, that's what I learnt:
 - TSMVE doesn't support VMDK disks larger than 2 TB (and therefore cannot 
backup them), although VMWARE VMDK file size limit is now 64 TB (and we already 
have some larger than 2 TB VMDK files). It have to something with snapshots.
 - There is no info or roadmap about when will this limitation be lifted
 - But if you want IBM to do it (their advise), you can open RFE procedure to 
ask for a design change http://www.ibm.com/developerworks/rfe/?BRAND_ID=90

Before doing #3 I want to know what do you think about this.

Regards,

Tuncel

-----Original Message-----
From: ADSM: Dist Stor Manager [mailto:ADSM-L AT VM.MARIST DOT EDU] On Behalf Of 
Tuncel Mutlu (BT Isletim ve Teknik Destek Bölümü)
Sent: Friday, October 10, 2014 1:43 PM
To: ADSM-L AT VM.MARIST DOT EDU
Subject: VMWARE VMDK size limit

Hi,

If I understand correctly, as of VCenter v5.5 VMWARE VMDK files size limit grow 
to 64 TB, but TDP for VMWARE has a 2 TB limit. Do you know when TDP for VMWARE 
will support bigger than 2 TB VMDK file size ? Because as of now we have 
several. I asked VMWARE admins if they can give less than 2 TB VMDK files and 
later concatenate them as a Dynamic disks inside the Windows, they say more 
VMDK files will increase hypervisor load, is it true ?

Restriction:


        Each individual VMDK involved in a backup operation
        cannot exceed 2 TB. If a VMDK exceeds 2 TB, the backup
        operation fails. To prevent a failure, you can skip
        processing the VMDK by specifying the vmskipmaxvmdks yes
        in the Tivoli Storage Manager backup-archive client
        options file or during the dsmc invocation.

So the workaround for this would be setting the option VMSKIPMAXVMDKS to YES.

Caution must be used with this option.
With this option set, the client will not fail the backup of any virtual 
machine that has disk greater than 2TB, but will continue the backup, skipping 
the disk that is over the Tivoli Storage Manager supported maximum size of 2TB.

See the APAR IC99953: BACKUP VM MESSAGE ANS2687W (RC6707) ON AUTOMATICALLY 
EXCLUDED INDEPENDENT OR PRDM DISKS

http://www-01.ibm.com/support/docview.wss?uid=swg1IC99953

Regards,

Tuncel







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Değerli görüş ve önerilerinizi internet sayfamızdaki Bize Ulaşın bölümünden 
iletebilirsiniz.
Bu e-posta ve muhtemel eklerinde verilen bilgiler kişiye özel ve gizli olup, 
yalnızca mesajda belirlenen alıcı ile ilgilidir. Size yanlışlıkla ulaşmışsa 
lütfen göndericiye bilgi veriniz, mesajı siliniz ve içeriğini başka bir kişiye 
açıklamayınız, herhangi bir ortama kopyalamayınız. Bu mesaj veya ekleri, aksi 
sözleşme ile veya mesaj içeriğinde açıkça belirtilmedikçe, herhangi bir işleme 
ilişkin olarak Bankamız adına herhangi bir teklif, kabul veya teyit amacı 
taşımamaktadır. Verilen bilgilerin doğru veya eksiksiz olmasına yönelik bir 
garanti verilmemekte olup, bilgiler önceden bildirilmeksizin 
değiştirilebilecektir. Bu mesajın içeriği Bankamızın resmi görüşlerini 
yansıtmayabileceğinden Akbank T.A.Ş. hiçbir hukuki sorumluluğu kabul etmez.

Akbank T.A.Ş Sabancı Center 4.Levent, 34330 İstanbul - Ticaret Sicil Memurluğu: 
İstanbul - Sicil Numarası: 90418 - www.akbank.com


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