readonly file system

readonly file system是指文件系统只能以只读方式访问，不能进行写入操作。这可能是由于文件系统已满、权限不足、磁盘损坏等原因导致的。在这种情况下，用户需要先解决文件系统的问题，才能进行写入操作。

相关问题

clickhouse readonly corresponding

ClickHouse supports the creation of read-only replicas of the primary cluster. These replicas can be used for read-heavy workloads to offload traffic from the primary cluster and improve query performance. To create a read-only replica, you can use the `REPLICA` keyword in the `CREATE TABLE` statement. For example:

CREATE TABLE my_table ON CLUSTER my_cluster
(
   ...
) ENGINE = ReplicatedMergeTree('/clickhouse/tables/{shard}/my_table', '{replica}')
PARTITION BY ...
ORDER BY ...
SETTINGS ...
PRIMARY KEY ...
REPLICA READONLY;

In the above example, the `REPLICA READONLY` clause creates a read-only replica of the table `my_table` on the cluster `my_cluster`. The replica is stored on the same file system as the primary cluster, but it cannot accept any write operations.

attempt to write a readonly databaseattempt to write a readonly database

As an AI language model, I do not have access to the file system and cannot attempt to write a readonly database. However, this error message typically occurs when a user tries to modify a database that has been set to read-only mode. In order to resolve this issue, the user must change the permissions of the database or remove the read-only flag.