According to the install guide, two disks are needed (one for OS and one for metadata) and a third disk is also needed if planning to use site cache. However, site cache is not mandatory. The following guidelines should be followed when determining whether or not site cache should be used:
"The optional local data cache enables faster backup and recovery for the objects that are most recently written to or read from the cloud, and should be used under these circumstances:
-Bandwidth is low with high latency
-You do not have streaming workload or continuous backup."
Note: thick provisioning should be used, so you may not want to deploy all 6TB of site cache at once if using it. You can start with a 200 GB cache disk and add additional ones as needed per the following configuration: "supported number of caching disks are either 1, 2, 4, 8, 16, or the maximum of 32. If the number of available caching disks is not equal to the number of supported disks, site cache consumes the maximum supported disk count less than or equal to the available disks, and the remaining disks are not used." Also note: "If a new data disk is less than the initial data disk size, CloudBoost generates a warning event and the disk is not added to the system. If a new data disk is bigger than the initial data disk size, CloudBoost generates a warning event, the disk is added to the system, but the excess space is not used."
Additional sizing details can be found on pages 15 - 17:
EricMC_4ab923
4 Posts
0
October 31st, 2016 11:00
Hi Dan,
According to the install guide, two disks are needed (one for OS and one for metadata) and a third disk is also needed if planning to use site cache. However, site cache is not mandatory. The following guidelines should be followed when determining whether or not site cache should be used:
"The optional local data cache enables faster backup and recovery for the objects that are most recently written to or read from the cloud, and should be used under these circumstances:
-Bandwidth is low with high latency
-You do not have streaming workload or continuous backup."
Note: thick provisioning should be used, so you may not want to deploy all 6TB of site cache at once if using it. You can start with a 200 GB cache disk and add additional ones as needed per the following configuration: "supported number of caching disks are either 1, 2, 4, 8, 16, or the maximum of 32. If the number of available caching disks is not equal to the number of supported disks, site cache consumes the maximum supported disk count less than or equal to the available disks, and the remaining disks are not used." Also note: "If a new data disk is less than the initial data disk size, CloudBoost generates a warning event and the disk is not added to the system. If a new data disk is bigger than the initial data disk size, CloudBoost generates a warning event, the disk is added to the system, but the excess space is not used."
Additional sizing details can be found on pages 15 - 17:
https://support.emc.com/docu71143_CloudBoost_2.1_Installation_Guide.pdf?language=en_US
I hope this helps.
Regards,
Eric
Dan1010
15 Posts
0
October 31st, 2016 12:00
thanks