在 KQL 查询中将磁盘大小从兆字节转换为千兆字节

Question

我有以下查询可以帮助我从虚拟机磁盘获取数据

    InsightsMetrics
| where Namespace == "LogicalDisk"
| extend Tags = todynamic(Tags)
| extend Drive=tostring(todynamic(Tags)["vm.azm.ms/mountId"])
| extend DiskSize=tostring(todynamic(Tags)["vm.azm.ms/diskSizeMB"])
| summarize 
Free_space_percentage = avgif(Val, Name == 'FreeSpacePercentage'),
Free_Gigabytes = avgif(Val, Name == 'FreeSpaceMB') /1024
by Computer, Drive
| join (
InsightsMetrics
| where Namespace == "LogicalDisk"
| extend Tags = todynamic(Tags)
| extend DiskSize=tostring(todynamic(Tags)["vm.azm.ms/diskSizeMB"])
| extend Drive=tostring(todynamic(Tags)["vm.azm.ms/mountId"])
) on Computer, Drive
| where DiskSize has "."
| summarize  by Computer,Drive , Free_space_percentage, Free_Gigabytes, DiskSize

现在的问题是 DiskSize 以兆字节显示，而其他所有内容均以千兆字节为单位。我现在已经尝试了几个小时，尝试将它转换为 gigas，但没有成功。有人可以帮助我在查询中在哪里以及如何进行转换吗？

Answer 1

您的问题似乎不在于将 MB 转换为 GB，而是构造一个查询，该查询将为您提供平均值和磁盘大小。
假设磁盘的大小在查询期间没有改变，take_any() 就可以了。

InsightsMetrics
// | where TimeGenerated between(datetime(2022-04-01) .. datetime(2022-04-01 00:00:10))
| where Namespace == "LogicalDisk"
| extend Tags = todynamic(Tags)
| extend Drive = tostring(Tags["vm.azm.ms/mountId"])
| extend diskSizeGB = Tags["vm.azm.ms/diskSizeMB"]/1024.0
| summarize 
     avg_FreeSpacePercentage = avgif(Val, Name == 'FreeSpacePercentage')
    ,avg_FreeSpaceGB = avgif(Val, Name == 'FreeSpaceMB') /1024
    ,take_any(diskSizeGB)
    by Computer, Drive

Computer	Drive	avg_FreeSpacePercentage	avg_FreeSpaceGB	diskSizeGB
DC00.na.contosohotels.com	C:	74.9538803100586	94.8232421875	126.50976181030273
DC00.na.contosohotels.com	D:	91.4168853759766	14.6240234375	15.998043060302734
SQL12.na.contosohotels.com	C:	57.7019577026367	72.998046875	126.50976181030273
SQL12.na.contosohotels.com	D:	92.02197265625	29.4443359375	31.998043060302734
SQL12.na.contosohotels.com	F:	99.9144668579102	127.7626953125	127.87304306030273
AppBE01.na.contosohotels.com	C:	73.2973098754883	92.7275390625	126.50976181030273
AppBE01.na.contosohotels.com	D:	91.3375244140625	14.611328125	15.998043060302734

Fiddle

在 KQL 查询中将磁盘大小从兆字节转换为千兆字节

Convert disk size from megabytes to gigabytes in KQL query

azure-log-analytics

kql