Hi Andrew, By using the -setrep command, can we change the replication factor of existing files? Or, can we change the replication factor of files dynamically? If that's possible, how much data movement overhead will occur? Thanks!
Lipeng On Tue, Mar 3, 2015 at 2:57 PM, Andrew Wang <andrew.w...@cloudera.com> wrote: > Yup, definitely. Check out the -setrep command: > > http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/FileSystemShell.html#setrep > > HTH, > Andrew > > On Tue, Mar 3, 2015 at 11:49 AM, Lipeng Wan <lipengwa...@gmail.com> wrote: > >> Hi Andrew, >> >> Thanks for your reply! >> Then is it possible for us to specify different replication factors >> for different files? >> >> Lipeng >> >> On Tue, Mar 3, 2015 at 2:38 PM, Andrew Wang <andrew.w...@cloudera.com> >> wrote: >> > Hi Lipeng, >> > >> > Right now that is unsupported, replication is set on a per-file basis, >> not >> > per-block. >> > >> > Andrew >> > >> > On Tue, Mar 3, 2015 at 11:23 AM, Lipeng Wan <lipengwa...@gmail.com> >> wrote: >> > >> >> Hi devs, >> >> >> >> By default, hdfs creates same number of replicas for each block. Is it >> >> possible for us to create more replicas for some of the blocks? >> >> Thanks! >> >> >> >> L. W. >> >> >>
