> ## Documentation Index
> Fetch the complete documentation index at: https://docs.kinetica.com/llms.txt
> Use this file to discover all available pages before exploring further.

# alter_tier

[Source](https://github.com/kineticadb/kinetica-api-rust/blob/master/crates/gpudb-api/src/generated/alter_tier.rs#L23-L26)
pub async fn [alter\_tier](https://docs.kinetica.com/content/api/rust/gpudb/struct.Kinetica/alter-tier.md#method.alter_tier)( \&self, name: [String](https://doc.rust-lang.org/1.98.1/alloc/string/struct.String.html), ) -> [Result](https://doc.rust-lang.org/1.98.1/core/result/enum.Result.html)\<[AlterTierResponse](https://docs.kinetica.com/content/api/rust/generated/api/struct.AlterTierResponse.md), [KineticaError](https://docs.kinetica.com/content/api/rust/errors/enum.KineticaError.md)>

Alter an existing tierAlters properties of an existing tier to facilitate resource management.To disable watermark-based eviction, set both high\_watermark and low\_watermark to 100.

##### Arguments

<ul>
  <li>`name` - Name of the tier to be altered. Must be an existing tier group name: vram, ram, disk\[n], persist, cold\[n].</li>
</ul>

[Source](https://github.com/kineticadb/kinetica-api-rust/blob/master/crates/gpudb-api/src/generated/alter_tier.rs#L41-L57)
pub async fn [alter\_tier\_with\_opts](https://docs.kinetica.com/content/api/rust/gpudb/struct.Kinetica/alter-tier.md#method.alter_tier_with_opts)( \&self, name: [String](https://doc.rust-lang.org/1.98.1/alloc/string/struct.String.html), options: [AlterTierRequestOptions](https://docs.kinetica.com/content/api/rust/generated/api/struct.AlterTierRequestOptions.md), ) -> [Result](https://doc.rust-lang.org/1.98.1/core/result/enum.Result.html)\<[AlterTierResponse](https://docs.kinetica.com/content/api/rust/generated/api/struct.AlterTierResponse.md), [KineticaError](https://docs.kinetica.com/content/api/rust/errors/enum.KineticaError.md)>

Alter an existing tierAlters properties of an existing tier to facilitate resource management.To disable watermark-based eviction, set both high\_watermark and low\_watermark to 100.

##### Arguments

<ul>
  <li>`name` - Name of the tier to be altered. Must be an existing tier group name: vram, ram, disk\[n], persist, cold\[n].</li>
  <li>`options` - The optional parameters; any left unset take the server’s defaults.</li>
</ul>

[Source](https://github.com/kineticadb/kinetica-api-rust/blob/master/crates/gpudb-api/src/generated/alter_tier.rs#L60-L71)
pub async fn [alter\_tier\_raw](https://docs.kinetica.com/content/api/rust/gpudb/struct.Kinetica/alter-tier.md#method.alter_tier_raw)( \&self, request: &[AlterTierRequest](https://docs.kinetica.com/content/api/rust/generated/api/struct.AlterTierRequest.md), ) -> [Result](https://doc.rust-lang.org/1.98.1/core/result/enum.Result.html)\<[AlterTierResponse](https://docs.kinetica.com/content/api/rust/generated/api/struct.AlterTierResponse.md), [KineticaError](https://docs.kinetica.com/content/api/rust/errors/enum.KineticaError.md)>

Sends a pre-built [`AlterTierRequest`](https://docs.kinetica.com/content/api/rust/generated/api/struct.AlterTierRequest) to the `/alter/tier` endpoint.

[Source](https://github.com/kineticadb/kinetica-api-rust/blob/master/crates/gpudb-api/src/generated/alter_tier.rs#L75-L87)
pub async fn [alter\_tier\_from\_url](https://docs.kinetica.com/content/api/rust/gpudb/struct.Kinetica/alter-tier.md#method.alter_tier_from_url)( \&self, url: &[str](https://doc.rust-lang.org/1.98.1/std/primitive.str.html), request: &[AlterTierRequest](https://docs.kinetica.com/content/api/rust/generated/api/struct.AlterTierRequest.md), ) -> [Result](https://doc.rust-lang.org/1.98.1/core/result/enum.Result.html)\<[AlterTierResponse](https://docs.kinetica.com/content/api/rust/generated/api/struct.AlterTierResponse.md), [KineticaError](https://docs.kinetica.com/content/api/rust/errors/enum.KineticaError.md)>

Sends a pre-built [`AlterTierRequest`](https://docs.kinetica.com/content/api/rust/generated/api/struct.AlterTierRequest) to a specific worker URL, bypassing HA head-node selection. Used for multi-head access.


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