删除由语义日志记录创建的旧 azure table 存储日志条目

Question

我已经实现了语义日志记录以将条目记录到 azure table 存储中。现在我想从 azure table 中删除旧的日志条目（比如超过 30 天）。问题是azuretable中的partitionKeys和RowKeys是动态生成的。像这样

PartitionKey         RowKey

2519569987199999999  MyProjectName_2519569788418593594_FFFFFFF8 //entry date 20 october 2015
2519573205599999999  MyProjectName_2519573006928838932_FFFFFFE1 // entry date 16 october 2015

我研究了一下，PartitionKey的格式是DateTime.MaxValue.Ticks - DateTime.UtcNow.Ticks

如何从 table 中获取数据进行删除？由于 partitionKey 是动态的，我是否需要进行完整的 table 扫描？

Answer 1

How can I fetch data from the table for deletion? Would I need to do a full table scan since the partitionKey is dynamic?

不，您不需要进行完整的 table 扫描。下面介绍了如何找出在 30 天之前创建的实体。

        var today = DateTime.UtcNow.Date;
        var thirtyDaysFromToday = today.AddDays(-30);
        var pk = (DateTime.MaxValue.Ticks - thirtyDaysFromToday.Ticks).ToString();
        var account = new CloudStorageAccount(new StorageCredentials(accountName, accountKey), true);
        var tableClient = account.CreateCloudTableClient();
        var table = tableClient.GetTableReference("YourTableName");
        TableQuery query = new TableQuery().Where("PartitionKey ge '" + pk + "'").Select(new List<string>(){"PartitionKey", "RowKey"});//Since you only need PartitionKey/RowKey for entities deletion thus just fetch that only
        TableContinuationToken token = null;
        do
        {
            var queryResult = table.ExecuteQuerySegmented(query, token);
            token = queryResult.ContinuationToken;
            var entities = queryResult.Results;
            //Now you can delete those entities
        }
        while (token != null);

注意：我还没有测试代码，所以请先尝试使用较小的数据集，然后再全力以赴:)

删除由语义日志记录创建的旧 azure table 存储日志条目

Deleting older azure table storage log entries created by semantic logging

logging

azure

azure-storage

semantic-logging