Hi, Just FYI, there is a known bug in that with certain memory configurations, you cannot dynamically manage memory allocation, so even though I am at the latest LDOM, firmware etc, I still can't allocate memory dynamically on my T5240's. Response I received from support was:
"I believe you're facing a known bug (not fixed yet) which is triggered by your hw memory setup. You have 12 dimms installed on your system , 8 on CMP0 and 4 on CMP1, this asymmetric hw setup creates a sparse memory configuration." The error I receive is: bash-3.00# ldm add-mem 2G testldom01 A sparse memory configuration does not support Memory DR. Please perform the operation while the LDom is bound or inactive Cheers Sean From: [email protected] [mailto:[email protected]] On Behalf Of Octave Orgeron Sent: 09 March 2011 23:50 To: [email protected]; [email protected] Subject: Re: [ldoms-discuss] Quick questions about latest in LDOMs Hi, Memory and CPUs are still partitioned into LDoms and not shared. You can dynamically add and remove them without rebooting a guest LDoms if you are on OVM for SPARC 2.0 and S10u9 or higher. Using ZFS has the back-end for the disks does perform well since atleast 1.0.3 from my testing. I do recommend the use of ZFS volumes over sparse files. For heavier I/O workloads and mobility(Live Migration and Solaris Cluster), I would recommend the use of dedicated SAN or iSCSI LUNs. In that case, you can either create dedicated ZFS pools for each guest or just assign the LUNs to the guest and use ZFS within the guest to manage the storage. Key thing to keep in mind is the size of the ZFS ARC and to restrict it in size (1GB seems to work well). This is especially true if you run ZFS in your control or service domain to manage the storage backends for your LDoms. I hope that helps out. Cheers! *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* Octave J. Orgeron Solaris Virtualization Architect and Consultant Web: http://unixconsole.blogspot.com E-Mail: [email protected] *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-* ________________________________ From: "[email protected]" <[email protected]> To: [email protected] Sent: Wed, March 9, 2011 2:59:37 PM Subject: [ldoms-discuss] Quick questions about latest in LDOMs All, We have some experience in LDOMs from the earlier days, but wanted some quick tips on the latest release. Appreciate it if anyone can comment on the following: * Is it now possible to share memory and CPU across LDOMs or do you still need to discretely define which resources are available only to given LDOMs? * With early releases, we had significant performance degradation with read/write performance overhead using LDOM disks presented via ZFS partitions; Thus, in order to have performance acceptable, we had to dedicate a disk per LDOM. Have there been any improvements in this area? Much appreciated, Chris... ________________________________ Stryker SA / Registered number: CH-550-0054924-4 / Registered office: Cit?-Centre, Grand rue 90, 1820 Montreux / VAT number: . 291987 Les informations contenues dans ce courriel ainsi que les ?ventuelles pi?ces jointes sont exclusivement destin?es ? l'usage du ou des destinataires pr?vus. Ce courriel peut contenir des informations privil?gi?es ou confidentielles aux yeux de la loi ou le produit d'un travail soumis au secret professionnel de l'avocat ou autrement prot?g? contre la divulgation. Aucune renonciation ? un quelconque privil?ge n'est envisag?e. Si vous n'?tes pas le destinataire pr?vu, toute interception, communication, diffusion ou copie est strictement interdite et pourra donner lieu ? des poursuites p?nales ou civiles ? votre encontre. Si vous avez re?u ce courriel par erreur, veuillez en avertir l'exp?diteur par t?l?phone ou par retour de courriel et confirmer que vous d?truirez ou effacerez de votre syst?me toutes les exemplaires de ce message et des ?ventuelles pi?ces jointes. The information contained in this email message and any attachments is exclusively for the use of the intended recipient(s). It may contain legally privileged, confidential information or work product subject to attorney-client privilege or otherwise protected from disclosure. No waiver of any privilege is intended. If you are not the intended recipient, any interception, dissemination, distribution or copying is strictly prohibited, and may subject you to criminal and/or civil penalties. If you have received this email message in error, please notify the sender by telephone or by email reply and confirm that you will destroy or delete all copies of the message and any attachments from your system.
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