---
name: "gtst"
section: "1"
platform: "linux"
package: "scotch"
version: "7.0.17-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/gtst"
---

# gtst(1)

test the consistency of source graphs

## NAME

**gtst** - test the consistency of source graphs

## SYNOPSIS

```
gtst [options] [gfile] [lfile]
```

## DESCRIPTION

**The gtst program checks, in a sequential way, the consistency of a** **Scotch source graph and, in case of success, outputs some statistics** **regarding edge weights, vertex weights, and vertex degrees.**

**It produces the very same results as the [dgtst(1)](/dgtst/1.md) program of the** **PT-Scotch parallel distribution, but unlike this latter it cannot** **handle distributed graphs.**

**Source graph file** *gfile* **can only be a centralized graph file. The** **resulting statistics are stored in file** *lfile***. When file names are** **not specified, data is read from standard input and written to** **standard output. Standard streams can also be explicitly** **represented by a dash '-'.**

**When the proper libraries have been included at compile time, gtst** **can directly handle compressed graphs, both as input and output. A** **stream is treated as compressed whenever its name is postfixed with** **a compressed file extension, such as in 'brol.grf.bz2' or '-.gz'. The** **compression formats which can be supported are the bzip2 format** **('.bz2'), the gzip format ('.gz'), and the lzma format ('.lzma').**

## OPTIONS

- **-h**

  **Display some help.**

- **-V**

  **Display program version and copyright.**

## EXAMPLE

**Test the consistency of graph brol.grf:**

```
    $ gtst brol.grf
```

## SEE ALSO

**[dgtst(1)](/dgtst/1.md), [gbase(1)](/gbase/1.md), [gmap(1)](/gmap/1.md), [gord(1)](/gord/1.md), [gout(1)](/gout/1.md).**

**Scotch user's manual.**

## AUTHOR

**Francois Pellegrini \<francois.pellegrini@labri.fr\>**