Lindorm Archive cloud storage is a cold storage medium that costs less than storage-optimized cloud storage. You can use it to store historical data that you access infrequently, such as data that is read only once or twice a year per file, with a small amount of data read per access. Examples include Internet of Vehicles (IoV) data and application log data that is over one year old. This helps you reduce storage costs. This topic describes the features of Archive cloud storage.
Archive cloud storage is in beta. To enable this feature, contact Lindorm technical support (DingTalk ID: s0s3eg3).
Features
Low storage cost at one-third the price of storage-optimized cloud storage.
Simple billing. You are charged only for storage.
Supports tiered storage for column-store data. You can set a hot and cold data separation policy to automatically dump data between hot and cold storage media. For more information, see Hot and cold storage media.
Enable archive cloud storage
To enable Archive cloud storage, see Enable Archive cloud storage.
Read throttling for Archive cloud storage
Archive cloud storage is designed for historical data that you access infrequently. This data is typically read only once or twice a year per file, with a small amount of data read per access.
Each instance consumes available read traffic when it reads underlying files. The more data you read, the more read traffic you consume.
The available read traffic depends on the purchased capacity of your Archive cloud storage. The current rate is
8.44 GiB/TiB/month. When you enable this feature, the system provides an initial three-month traffic quota by default. The available traffic quota increases every second and is deducted when used.To temporarily increase the available read traffic, contact Lindorm technical support (DingTalk ID: s0s3eg3) for an evaluation.
Notes
Archive cloud storage is inexpensive, but it limits the amount of data you can read. Do not use it for scenarios with small data volumes.
The minimum purchase capacity for Archive cloud storage is 10 TiB. The scaling step size must be at least 10 TiB.
Data in Archive cloud storage is deleted asynchronously. The underlying storage first moves files to the recycle bin, and then permanently deletes them after 60 days.
Reading data from Archive cloud storage or converting it to other storage classes consumes read traffic.
If the usage of Archive cloud storage exceeds 95%, data writes will fail. Monitor the usage of your Archive cloud storage. To learn how to view the usage, see View the capacity of Archive cloud storage.
View monitoring metrics for Archive cloud storage
Log on to the Lindorm console. In the upper-left corner of the page, select the region of the instance. On the Instances page, click the ID of the target instance or click View Instance Details in the Actions column for the instance.
In the navigation pane on the left, click Instance Monitoring and view the Underlying Storage Metrics. The following table describes the metrics.
Metric
Description
Archive Storage Available Read Traffic
The amount of read traffic available. For example, a value of 200 GiB means that 200 GiB of data can still be read.
Archive Storage Read Rate
The rate at which each node reads data from Archive cloud storage. For example, 20 MiB/s.
Archive Storage Read Throttling Count
If the available read traffic is exceeded, read operations are throttled. If this metric has a value, data queries slow down significantly.
File Size to Be Converted to Archive
After a conversion policy is set for the column store, data is gradually converted in the background. This metric shows the conversion progress.
NoteThis metric may not be displayed for small data volumes. Check the conversion progress by viewing the change in the available capacity of Archive cloud storage. To learn how to view the available capacity, see View the capacity of Archive cloud storage.