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robopet3VAAI and the Unlimited VMs per Datastore Urban Myth
One of the oldest debates in VMware lore is “How many virtual machines should I place on each datastore?” For this discussion, the context is block storage (as opposed to NFS). There were all sorts of opinions as well as technical constraints to be considered. There was the tried and true rule of thumb answer of 10-15-20 which has more than stood the test of time. The best qualified answer was usually: “Whatever fits best for your consolidated environment” which translates to “it depends” and an invoice in consulting language.
http://www.boche.net/blog/2013/02/28/vaai-and-the-unlimited-vms-per-datastore-urban-myth/
Перевод
Миф о неограниченном размещении ВМ на VMFS-хранилище с VAAI
https://vmind.ru/2013/03/12/myth-unlimited-vm-vmfs-datastore-vaai/
Дополнительные ссылки из комментариев:
I have documented them at our blog site,
http://www.purestorage.com/blog/virtualization-and-flash-blog-post-3/
and at
http://www.purestorage.com/blog/1000-vms-demo-vmworld-2011/
Вопрос про ограничения VM per datastore не так прост, ограничения до сих пор есть в документах:
However, in most circumstances and environments, a target of 15 to 25 virtual machines per
datastore is the conservative recommendation. By maintaining a smaller number of virtual machines per
datastore, potential for I/O contention is greatly reduced, resulting in more consistent performance across the
environment.
https://www.dellemc.com/sl-si/collaterals/unauth/technical-guides-support-information/PowerVault_ME4_Series_and_VMware_vSphere.pdf
Более подробно ситуация описана в чуть более свежей статье
Understanding VMware ESXi Queuing and the FlashArray
https://www.codyhosterman.com/2017/02/understanding-vmware-esxi-queuing-and-the-flasharray/
и
Setting the Maximum Outstanding Disk Requests for virtual machines (1268)
https://kb.vmware.com/s/article/1268
One of the oldest debates in VMware lore is “How many virtual machines should I place on each datastore?” For this discussion, the context is block storage (as opposed to NFS). There were all sorts of opinions as well as technical constraints to be considered. There was the tried and true rule of thumb answer of 10-15-20 which has more than stood the test of time. The best qualified answer was usually: “Whatever fits best for your consolidated environment” which translates to “it depends” and an invoice in consulting language.
http://www.boche.net/blog/2013/02/28/vaai-and-the-unlimited-vms-per-datastore-urban-myth/
Перевод
Миф о неограниченном размещении ВМ на VMFS-хранилище с VAAI
https://vmind.ru/2013/03/12/myth-unlimited-vm-vmfs-datastore-vaai/
Дополнительные ссылки из комментариев:
I have documented them at our blog site,
http://www.purestorage.com/blog/virtualization-and-flash-blog-post-3/
and at
http://www.purestorage.com/blog/1000-vms-demo-vmworld-2011/
Вопрос про ограничения VM per datastore не так прост, ограничения до сих пор есть в документах:
However, in most circumstances and environments, a target of 15 to 25 virtual machines per
datastore is the conservative recommendation. By maintaining a smaller number of virtual machines per
datastore, potential for I/O contention is greatly reduced, resulting in more consistent performance across the
environment.
https://www.dellemc.com/sl-si/collaterals/unauth/technical-guides-support-information/PowerVault_ME4_Series_and_VMware_vSphere.pdf
Более подробно ситуация описана в чуть более свежей статье
Understanding VMware ESXi Queuing and the FlashArray
https://www.codyhosterman.com/2017/02/understanding-vmware-esxi-queuing-and-the-flasharray/
и
Setting the Maximum Outstanding Disk Requests for virtual machines (1268)
https://kb.vmware.com/s/article/1268
