---
name: "arc-infoindex-relay"
section: "8"
platform: "linux"
package: "nordugrid-arc-egiis"
version: "5.4.3-2"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/arc-infoindex-relay"
---

# arc-infoindex-relay(8)

ARC Information Index Relay Helper

## NAME

arc-infoindex-relay - ARC Information Index Relay Helper

## DESCRIPTION

The **arc-infoindex-relay** command is used internally by the ARC Information System to relay queries and responses between the slapd server and the arc-infoindex-server

## SYNOPSIS

**arc-infoindex-relay** *server-fifo*

## ARGUMENTS

- **server-fifo**

  The FIFO on which the arc-infoindex-server accepts queries

## EXTENDED DESCRIPTION

**arc-infoindex-relay** acts as a bridge between the slapd server and the arc-infoindex-server in the NorduGrid ARC Information system. For each index served by the arc-infoindex-server a shell backend database should be configured in the slapd configuration.

Here is a sample configuration:

```
database  shell
suffix    "Mds-Vo-name=Sweden,o=Grid"
bind      /usr/sbin/arc-infoindex-relay /var/run/arc/infosys/giis-fifo
add       /usr/sbin/arc-infoindex-relay /var/run/arc/infosys/giis-fifo
search    /usr/sbin/arc-infoindex-relay /var/run/arc/infosys/giis-fifo
access to * by * write
```

When a query for the configured database is received by the slapd server, the server will call out to the arc-infoindex-relay. The arc-infoindex-relay will then open a unique return FIFO for this query and then forward the query and the name of the return FIFO to the arc-infoindex-server through the configured server FIFO. When the arc-infoindex-server has processed the query it will return the result to the arc-infoindex-relay using the return FIFO. The arc-infoindex-relay then closes the return FIFO and forwards the response to the slapd server.

## COPYRIGHT

APACHE LICENSE Version 2.0

## AUTHOR

Mattias Ellert \<mattias.ellert@fysast.uu.se\>

## SEE ALSO

[**arc-infoindex-server**(8)](/arc-infoindex-server/8.md)