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The vdsPersistentCache table contains data records that store session state information for various session types. This session state information is recorded to accomplish tasks that involve several steps and allow load-balancing and failover strategies in replicated environments.
It stores session state information for the following:
Challenge data required for push notification–based authentication using the OneSpan Mobile Authenticator app.
Registration information, used for online activation of OneSpan Mobile Authenticator app instances.
Signature information used for Secure Channel signatures.
Administrative session information that are used for administrative purposes.
Columns
Table: vdsPersistentCache table columns
Column name
Data type
Primary key
Nullable
Description
vdsKey
varchar(255)
Yes
No
The unique identifier of the session cache entry.
vdsCacheType
integer
No
No
The cache type of this data record, e.g. challenge cache or registration cache.
vdsWorkflowStatus
integer
No
Yes
The state in the workflow at which the data record has been created or modified. For instance, in case of an authentication using push notifications, this may indicate the notification has been sent, the authentication has been successful, etc.
vdsElement
varchar(32768)
No
No
The BLOB storing the serialized cache record data.
vdsExpired
integer
No
Yes
The expiration state of the data record. Expired data records are automatically cleaned up at regular intervals.
vdsVersion
integer
No
Yes
The current data schema version of the data record.
vdsCreateTime
timestamp
No
No
The date and time the data record was created.
vdsModifyTime
timestamp
No
No
The date and time the data record was last modified.
vdsUpdateIndicator
integer
No
No
Flag to indicate changes in the cache records to prevent data coherency issues between multiple server instances.
vdsUserId
varchar(255)
No
Yes
The user ID of the session owner in case of administrative sessions.
vdsDomain
varchar(255)
No
Yes
The domain of the session owner in case of administrative sessions.
Keys
Primary key: (vdsKey)
Foreign keys: None.
Indexes
Table: vdsPersistentCache table indexes
Index name
Included fields
Level 0 (default)
vdspersistentcacheidx
vdsKey
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