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04-18-2016
09:58 AM
Some more questions based on this thread Once storage configuration is defined and SSDs/ Disks are identified by HDFS, does all drives (SSDs+ DIsks) are used and single virtual storage ? if yes does it mean while running jobs/queries some data blocks would be fetched from Disks while others from SSDs? or two different virtual storage hot and cold?? If Yes, while copying/generating data in HDFS, will there be 3 copies of data across disks+storage or 3 copies in Disks and 3 copies in SSDs ; total 6 copies? how do I force data to be used from SSDs only or DISKs only; while submitting any Jobs/queries using various tools(hive, Impala, spark etc)
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