You could use the JSR-223 feature of the shell. I whipped up the javascript,
has not been tested, but something like it should work. You can run it using
the command:
script -e js -f /<script_location> -a table=<tableName>
Here is a script that counts files for a table. You could easily modify this to
fetch a unique colf from the metadata table for any given tablet and if you
count based on that, then you have the number of tablets.
importPackage(java.lang);
importPackage(java.util);
importPackage(org.apache.hadoop.io);
importPackage(org.apache.accumulo.core.data);
importPackage(org.apache.accumulo.core.security);
var tableId = connection.tableOperations().tableIdMap().get(table);
var auths = new Authorizations();
var scanner = connection.createScanner("accumulo.metadata", auths);
scanner.setRange(new Range(tableId+;", tableId+"<");
scanner.fetchColumnFamily(new Text("file"));
var iter = scanner.iterator();
var files = 0;
while (iter.hasNext()) {
files = files + 1;
}
println(files);
> On January 24, 2017 at 9:34 AM Michael Wall <[email protected]> wrote:
>
> Matt,
>
> I typically run the following to see all the online tablets
>
> scan -t accumulo.metadata -c loc
>
> and the following to find all tablets, online and offline
>
> scan -t accumulo.metadata -c ~tab
>
>
>
> On Mon, Jan 23, 2017 at 11:35 PM Josh Elser <[email protected]
> mailto:[email protected] > wrote:
>
> > > I believe this would be the number of unique rows in the Accumulo
> > metadata table (that don't fall in the "~del" prefix).
> >
> > Not sure if we have a class you could just invoke, but this would be
> > pretty easy to script just using the Accumulo shell.
> >
> > Dickson, Matt MR wrote:
> > > *UNOFFICIAL*
> > >
> > > Is there a way to query to the metadata table to quickly get a
> > list of
> > > the number of tablets for all tables in an Accumulo instance?
> > > I'd like to do this to integrate into existing monitoring tools
> > rather
> > > than go to the Accumulo gui.
> > > Thanks in advance
> >
> > >
