I faced up with a strange scala-io moveTo method issue. Here is my filesystem, tmp directory resides in ram.
~ % df -Th ~/ :) Filesystem Type Size Used Avail Use% Mounted on rootfs rootfs 112G 18G 89G 17% / /dev devtmpfs 3.9G 0 3.9G 0% /dev run tmpfs 3.9G 236K 3.9G 1% /run /dev/sda btrfs 112G 18G 89G 17% / shm tmpfs 3.9G 872K 3.9G 1% /dev/shm tmpfs tmpfs 3.9G 34M 3.9G 1% /tmp
When moving file from tmp to home directory or backwards, first it's wery slow (subjectively about 1M/s, while iotop shows ridiculous 1500M/s), second it causes 100% cpu load. When moving files within same filesystem, everything works as expected.
Welcome to Scala version 2.9.1.final (Java HotSpot(TM) 64-Bit Server VM, Java 1.7.0_03).
Type in expressions to have them evaluated.
Type :help for more information.
scala> import scalax.file.Path
import scalax.file.Path
scala> val tmp = Path("/tmp/ensime")
tmp: scalax.file.Path = Path(/tmp/ensime)
scala> tmp.exists
res0: Boolean = true
scala> val home = Path("/home/_4e6/dest")
home: scalax.file.Path = Path(/home/_4e6/dest)
scala> home.exists
res1: Boolean = false
scala> tmp.moveTo(home) // very slow
res2: scalax.file.Path = Path(/home/_4e6/dest)
scala> home.moveTo(tmp) // a bit faster but still unsatisfactory
res3: scalax.file.Path = Path(/tmp/ensime)
In addition, copyTo method works fine; replace and atomicMove flags doesn't change anything; and ramfs is not working for me.
scala> val fs = scalax.file.ramfs.RamFileSystem()
fs: scalax.file.ramfs.RamFileSystem = Ram File System
scala> val ramTmp = fs("/tmp/ensime")
ramTmp: scalax.file.Path = RamPath(/tmp/ensime)
scala> ramTmp.exists
res9: Boolean = false