An append only array files format.
Basically just split tarr
Two files a.idx.starr and a.dat.starr:
016
022
028
031
hello
world
hi
Appends are now possible.
cat a.index.starr a.data.starr will create the equivalent a.tarr.
Note that the index file has to contain numbers prefixed with sufficient zeroes. Otherwise appends might fail.