# Backup

## Tssync

Tssync is a tool that enables data synchronization between TStorage clusters.

```text
USAGE: tssync FUNCTION [PARAMETERS]
FUNCTIONS:
    --help              Displays this help.
    --version           Displays version numbers.
SRC AND DST:
    --src HOST:PORT     Provides source TStorage network configuration.
    --dst HOST:PORT     Provides destination TStorage network configuration.
KEYRANGE OPTIONS (KEYRANGE IS RIGHT OPEN):
    --mincid            Min cid of bounding keyrange. Default value: 0
    --maxcid            Max cid of bounding keyrange. Default value: 2147483647
    --minmid            Min mid of bounding keyrange. Default value: -9223372036854775808
    --maxmid            Max mid of bounding keyrange. Default value: 9223372036854775807
    --minmoid           Min moid of bounding keyrange. Default value: -2147483648
    --maxmoid           Max moid of bounding keyrange. Default value: 2147483647
    --mincap            Min cap of bounding keyrange. Default value: -9223372036854775808
    --maxcap            Max cap of bounding keyrange. Default value: 9223372036854775807
    --minacq            Min acq of bounding keyrange. Default value: -9223372036854775808
    --maxacq            Max acq of bounding keyrange. Default value: 9223372036854775807
ADVANCED OPTIONS:
    --log               Path to log file. If not provided, no log file is created.
    --verbose           Verbose level in range: [0,7], where 1 - errors, 2 - warnings, 4 - info. Default value: 3(errors + warnings)
    --timeout           Timeout (milliseconds) for clients connecting to src and dst. Default value: -1
    --bufSize           Client's serializer size. Default value: 10485760
    --maxPayload        Maximal size of payload that is considered correct. Default value: 33554432
    --dstCapacity       Records limit that dst recs uses. Default value: 10000000
    --dstSizeLimitByte  Buffer size that dst recs uses. Default value: 440000000
    --srcCapacity       Records limit that src recs uses. Default value: 10000000
    --srcSizeLimitByte  Buffer size that src recs uses. Default value: 440000000
    --recSVO            "recSVO" parameter of internal RecsSimple instances. Default value: 8
    --dry-run           "dry-run" parameter prevents tssync from sending differences to dst. Inactive by default.
OTHER:
    --stats             Print statistics after synchronization (correct or not).
EXAMPLES:
    tssync --src 10.0.0.1:2025 --dst 10.0.0.2:3025 --minacq 0 --maxacq 10
```