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From Ken Krugler <kkrugler_li...@transpac.com>
Subject Re: Running on multiple CPU's
Date Mon, 16 Apr 2007 17:17:37 GMT
At 9:41 am -0700 4/16/07, Doug Cutting wrote:
>Eelco Lempsink wrote:
>>Inspired by 
>>I'm trying to run Hadoop on multiple CPU's, but without using HDFS.
>To be clear: you need some sort of shared filesystem, if not HDFS, 
>then NFS, S3, or something else.  For example, the job client 
>interacts with the job tracker by copying files to the shared 
>filesystem named by fs.default.name, and job inputs and outputs are 
>assumed to come from a shared filesystem.
>So, if you're using NFS, then you'd set fs.default.name to something 
>like "file:///mnt/shared/hadoop/".  Note also that as your cluster 
>grows, NFS will soon become a bottleneck.  That's why HDFS is 
>provided: there aren't other readily available shared filesystems 
>that scale appropriately.

Has anybody been using Hadoop with ZFS? Would ZFS count as a readily 
available shared file system that scales appropriately?


-- Ken
Ken Krugler
Krugle, Inc.
+1 530-210-6378
"Find Code, Find Answers"

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