# Scality sproxyd¶

Using the sproxy driver requires using fs-dictmap/Cassandra. See fs-dictmap Configuration and fs-dictmap with Cassandra for details and an example configuration.

plugin {
# Basic configuration:
obox_fs = sproxyd:http://scality.example.com/?parameters
}


The parameters are:

Parameter

Description

See HTTP-Based Object Storages for common parameters

class

Scality Class of Service. 2 means that the objects are written to the Scality RING 3 times in total. This is generally the minimum allowable redundancy for mail and index objects.

FTS data is more easily reproducible, so losing those indexes is not as critical; Class of Service 1 may be appropriate based on customer requirements.

by-path

Objects are accessed by path instead of by object ID. Scality sproxyd internally converts the paths into object IDs. This shouldn’t normally be used.

avoid_423=<Millisecond Time>

Using this setting allows to delay DELETE requests if the same object ID has been GET/HEAD/PUT by the same process within <Millisecond Time>. This is intended to reduce “423 Locked” sent by Scality.

When avoid_423 is not set, no delay is added. Normally this setting should not be used. It should be only be set, if it can be seen to bring a benefit. Careful investigation of current error-rates and consideration of the overall throughput of the platform are recommended before using it.

New in version 2.3.15.

Dovecot uses its own Scality key format, which encodes the object type also to the key itself. See Scality Key Format.