Comments on: HA and Slot sizes http://www.yellow-bricks.com/2009/08/12/ha-and-slot-sizes/ Building blocks for virtualization... Wed, 17 Mar 2010 20:50:05 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: michael http://www.yellow-bricks.com/2009/08/12/ha-and-slot-sizes/comment-page-1/#comment-4698 michael Sun, 04 Oct 2009 21:02:43 +0000 http://www.yellow-bricks.com/?p=3656#comment-4698 thanks, Duncan thanks, Duncan

]]> By: Duncan Epping http://www.yellow-bricks.com/2009/08/12/ha-and-slot-sizes/comment-page-1/#comment-4670 Duncan Epping Fri, 02 Oct 2009 14:16:46 +0000 http://www.yellow-bricks.com/?p=3656#comment-4670 no they do not. no they do not.

]]> By: michael http://www.yellow-bricks.com/2009/08/12/ha-and-slot-sizes/comment-page-1/#comment-4378 michael Tue, 25 Aug 2009 07:40:39 +0000 http://www.yellow-bricks.com/?p=3656#comment-4378 so reservations at resource pool level do not affect failover capacity? so reservations at resource pool level do not affect failover capacity?

]]> By: Duncan Epping http://www.yellow-bricks.com/2009/08/12/ha-and-slot-sizes/comment-page-1/#comment-4374 Duncan Epping Mon, 24 Aug 2009 08:54:02 +0000 http://www.yellow-bricks.com/?p=3656#comment-4374 Yes it will avoid these issues. Yes it will avoid these issues.

]]> By: michael http://www.yellow-bricks.com/2009/08/12/ha-and-slot-sizes/comment-page-1/#comment-4373 michael Mon, 24 Aug 2009 08:04:12 +0000 http://www.yellow-bricks.com/?p=3656#comment-4373 5. Suttoi said, August 17th, 2009 at 08:12 If you pool servers by service / application and give them no direct reservation, but instead make a reservation at the resource pool level, will this avoid admission control problems? can someone answer the question? 5. Suttoi said, August 17th, 2009 at 08:12 If you pool servers by service / application and give them no direct reservation, but instead make a reservation at the resource pool level, will this avoid admission control problems?

can someone answer the question?

]]> By: Suttoi http://www.yellow-bricks.com/2009/08/12/ha-and-slot-sizes/comment-page-1/#comment-4332 Suttoi Mon, 17 Aug 2009 06:12:36 +0000 http://www.yellow-bricks.com/?p=3656#comment-4332 If you pool servers by service / application and give them no direct reservation, but instead make a reservation at the resource pool level, will this avoid admission control problems? If you pool servers by service / application and give them no direct reservation, but instead make a reservation at the resource pool level, will this avoid admission control problems?

]]> By: Duncan http://www.yellow-bricks.com/2009/08/12/ha-and-slot-sizes/comment-page-1/#comment-4324 Duncan Sat, 15 Aug 2009 04:43:33 +0000 http://www.yellow-bricks.com/?p=3656#comment-4324 it's not the best but the least restrictive. the best is when you are using a realistic reservation on at least one machine so that the slots are correctly sized. it’s not the best but the least restrictive. the best is when you are using a realistic reservation on at least one machine so that the slots are correctly sized.

]]> By: NiTRo http://www.yellow-bricks.com/2009/08/12/ha-and-slot-sizes/comment-page-1/#comment-4319 NiTRo Fri, 14 Aug 2009 22:26:02 +0000 http://www.yellow-bricks.com/?p=3656#comment-4319 So the best case Is when no vm in the cluster has reservation ? So the best case Is when no vm in the cluster has reservation ?

]]> By: Frank Wegner http://www.yellow-bricks.com/2009/08/12/ha-and-slot-sizes/comment-page-1/#comment-4291 Frank Wegner Wed, 12 Aug 2009 14:52:58 +0000 http://www.yellow-bricks.com/?p=3656#comment-4291 oops, not "increase slot size" but "increase failover capacity". oops, not “increase slot size” but “increase failover capacity”.

]]> By: Frank Wegner http://www.yellow-bricks.com/2009/08/12/ha-and-slot-sizes/comment-page-1/#comment-4290 Frank Wegner Wed, 12 Aug 2009 14:52:03 +0000 http://www.yellow-bricks.com/?p=3656#comment-4290 If you do not want to tweak advanced parameters you could also check if you really need the large exceptional reservations. Reducing the reservation will also increase the HA slot size. One example I know: a single VM with 40 GB memory reservation crippled HA (failover capacity = 0), setting the reservation to 10 GB helped a lot. If you do not want to tweak advanced parameters you could also check if you really need the large exceptional reservations. Reducing the reservation will also increase the HA slot size. One example I know: a single VM with 40 GB memory reservation crippled HA (failover capacity = 0), setting the reservation to 10 GB helped a lot.

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