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Why does my FusionIO card become umounted during loads to hdfs?

Why does my FusionIO card become umounted during loads to hdfs?

I recently installed HDP 2.5 with Ambari on an 8 node cluster on VMWare. I have FusionIO cards installed on the VM hosts. I allocated 4 volumes each to 6 datanodes in the cluster for hdfs storage. Everything is up and running, hdfs dfs –mkdir works, so great. But then, when I run hdfs dfs –put, the hdfs volumes on FusionIO become unmounted. Any ideas why?

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Re: Why does my FusionIO card become umounted during loads to hdfs?

I can't answer your question exactly, but I have heard rumours (only rumours, no details) that other people have struggled to get FusionIO working too. The "workaround" was to go back to SSDs or HDDs. Another possible workaround, if you need the sort of speed that FusionIO promises might be to use Ramdisks instead. I realise that Ramdisks are volatile, and might not give you what you need. Please see https://hadoop.apache.org/docs/r2.7.1/hadoop-project-dist/hadoop-hdfs/MemoryStorage.html