Reference documentation and code samples for the Google BigQuery Storage V1 Client class CreateReadSessionRequest.
Request message for CreateReadSession.
Generated from protobuf message google.cloud.bigquery.storage.v1.CreateReadSessionRequest
Namespace
Google \ Cloud \ BigQuery \ Storage \ V1Methods
__construct
Constructor.
| Parameters | |
|---|---|
| Name | Description |
data |
array
Optional. Data for populating the Message object. |
↳ parent |
string
Required. The request project that owns the session, in the form of |
↳ read_session |
ReadSession
Required. Session to be created. |
↳ max_stream_count |
int
Max initial number of streams. If unset or zero, the server will provide a value of streams so as to produce reasonable throughput. Must be non-negative. The number of streams may be lower than the requested number, depending on the amount parallelism that is reasonable for the table. There is a default system max limit of 1,000. This must be greater than or equal to preferred_min_stream_count. Typically, clients should either leave this unset to let the system to determine an upper bound OR set this a size for the maximum "units of work" it can gracefully handle. |
↳ preferred_min_stream_count |
int
The minimum preferred stream count. This parameter can be used to inform the service that there is a desired lower bound on the number of streams. This is typically a target parallelism of the client (e.g. a Spark cluster with N-workers would set this to a low multiple of N to ensure good cluster utilization). The system will make a best effort to provide at least this number of streams, but in some cases might provide less. |
getParent
Required. The request project that owns the session, in the form of
projects/{project_id}.
| Returns | |
|---|---|
| Type | Description |
string |
|
setParent
Required. The request project that owns the session, in the form of
projects/{project_id}.
| Parameter | |
|---|---|
| Name | Description |
var |
string
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getReadSession
Required. Session to be created.
| Returns | |
|---|---|
| Type | Description |
ReadSession|null |
|
hasReadSession
clearReadSession
setReadSession
Required. Session to be created.
| Parameter | |
|---|---|
| Name | Description |
var |
ReadSession
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getMaxStreamCount
Max initial number of streams. If unset or zero, the server will provide a value of streams so as to produce reasonable throughput. Must be non-negative. The number of streams may be lower than the requested number, depending on the amount parallelism that is reasonable for the table.
There is a default system max limit of 1,000. This must be greater than or equal to preferred_min_stream_count. Typically, clients should either leave this unset to let the system to determine an upper bound OR set this a size for the maximum "units of work" it can gracefully handle.
| Returns | |
|---|---|
| Type | Description |
int |
|
setMaxStreamCount
Max initial number of streams. If unset or zero, the server will provide a value of streams so as to produce reasonable throughput. Must be non-negative. The number of streams may be lower than the requested number, depending on the amount parallelism that is reasonable for the table.
There is a default system max limit of 1,000. This must be greater than or equal to preferred_min_stream_count. Typically, clients should either leave this unset to let the system to determine an upper bound OR set this a size for the maximum "units of work" it can gracefully handle.
| Parameter | |
|---|---|
| Name | Description |
var |
int
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
getPreferredMinStreamCount
The minimum preferred stream count. This parameter can be used to inform the service that there is a desired lower bound on the number of streams.
This is typically a target parallelism of the client (e.g. a Spark cluster with N-workers would set this to a low multiple of N to ensure good cluster utilization). The system will make a best effort to provide at least this number of streams, but in some cases might provide less.
| Returns | |
|---|---|
| Type | Description |
int |
|
setPreferredMinStreamCount
The minimum preferred stream count. This parameter can be used to inform the service that there is a desired lower bound on the number of streams.
This is typically a target parallelism of the client (e.g. a Spark cluster with N-workers would set this to a low multiple of N to ensure good cluster utilization). The system will make a best effort to provide at least this number of streams, but in some cases might provide less.
| Parameter | |
|---|---|
| Name | Description |
var |
int
|
| Returns | |
|---|---|
| Type | Description |
$this |
|
static::build
| Parameters | |
|---|---|
| Name | Description |
parent |
string
Required. The request project that owns the session, in the form of
|
readSession |
ReadSession
Required. Session to be created. |
maxStreamCount |
int
Max initial number of streams. If unset or zero, the server will provide a value of streams so as to produce reasonable throughput. Must be non-negative. The number of streams may be lower than the requested number, depending on the amount parallelism that is reasonable for the table. There is a default system max limit of 1,000. This must be greater than or equal to preferred_min_stream_count. Typically, clients should either leave this unset to let the system to determine an upper bound OR set this a size for the maximum "units of work" it can gracefully handle. |
| Returns | |
|---|---|
| Type | Description |
CreateReadSessionRequest |
|