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src/server/worker_task.rs: speedup upid_read_status()

This commit is contained in:
Dietmar Maurer 2019-04-09 15:11:48 +02:00
parent d8d40dd0c2
commit 0bfd87bc5e
1 changed files with 9 additions and 2 deletions
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11
src/server/worker_task.rs
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@ -121,12 +121,19 @@ pub fn create_task_log_dirs() -> Result<(), Error> {
Ok(()) Ok(())
} }
fn upid_read_status(upid: &UPID) -> Result<String, Error> { /// Read exits status from task log file
pub fn upid_read_status(upid: &UPID) -> Result<String, Error> {
let mut status = String::from("unknown"); let mut status = String::from("unknown");
let path = upid.log_path(); let path = upid.log_path();
let file = File::open(path)?; let mut file = File::open(path)?;
/// speedup - only read tail
use std::io::Seek;
use std::io::SeekFrom;
let _ = file.seek(SeekFrom::End(-8192)); // ignore errors
let reader = BufReader::new(file); let reader = BufReader::new(file);
for line in reader.lines() { for line in reader.lines() {