Redirector Object - Win32 Programmer's Reference

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Redirector Object

The Redirector performance object consists of counter that monitor network connections originating at the local computer.

Bytes Total/sec

Bytes Total/sec is the rate the Redirector is processing data bytes. This includes all application and file data in addition to protocol information such as packet headers.

Detail Level: Novice
Counter Type: PERF_COUNTER_BULK_COUNT

File Data Operations/sec
File Data Operations/sec is the rate the Redirector is processing data operations. One operation includes (hopefully) many bytes. We say hopefully here because each operation has overhead. You can determine the efficiency of this path by dividing the Bytes/sec by this counter to determine the average number of bytes transferred/operation.

Detail Level: Novice
Counter Type: PERF_COUNTER_COUNTER

Packets/sec
Packets/sec is the rate the Redirector is processing data packets. One packet includes (hopefully) many bytes. We say hopefully here because each packet has protocol overhead. You can determine the efficiency of this path by dividing the Bytes/sec by this counter to determine the average number of bytes transferred/packet. You can also divide this counter by Operations/sec to determine the average number of packets per operation, another measure of efficiency.

Detail Level: Novice
Counter Type: PERF_COUNTER_BULK_COUNT

Bytes Received/sec
Bytes Received/sec is the rate of bytes coming in to the Redirector from the network. It includes all application data as well as network protocol information (such as packet headers.)

Detail Level: Advanced
Counter Type: PERF_COUNTER_BULK_COUNT

Packets Received/sec
Packets Received/sec is the rate at which the Redirector is receiving packets (also called SMBs or Server Message Blocks). Network transmissions are divided into packets. The average number of bytes received in a packet can be obtained by dividing Bytes Received/sec by this counter. Some packets received might not contain incoming data, for example an acknowledgment to a write made by the Redirector would count as an incoming packet.

Detail Level: Advanced
Counter Type: PERF_COUNTER_BULK_COUNT

Read Bytes Paging/sec
Read Bytes Paging/sec is the rate at which the Redirector is attempting to read bytes in response to page faults. Page faults are caused by loading of modules (such as programs and libraries), by a miss in the Cache (see Read Bytes Cache/sec), or by files directly mapped into the address space of applications (a high-performance feature of Windows NT.)

Detail Level: Expert
Counter Type: PERF_COUNTER_BULK_COUNT

Read Bytes Non-Paging/sec
Read Bytes Non-Paging/sec are those bytes read by the Redirector in response to normal file requests by an application when they are redirected to come from another computer. In addition to file requests, this counter includes other methods of reading across the network such as Named Pipes and Transactions. This counter does not count network protocol information, just application data.

Detail Level: Expert
Counter Type: PERF_COUNTER_BULK_COUNT

Read Bytes Cache/sec
Read Bytes Cache/sec is the rate at which applications are accessing the file system cache by using the Redirector. Some of these data requests are satisfied by retrieving the data from the cache. Requests that miss the cache cause a page fault (see Read Bytes Paging/sec).

Detail Level: Expert
Counter Type: PERF_COUNTER_BULK_COUNT

Read Bytes Network/sec
Read Bytes Network/sec is the rate at which applications are reading data across the network. This occurs when data sought in the file system cache is not found there and must be retrieved from the network. Dividing this value by Bytes Received/sec indicates the proportion of application data traveling across the network (see Bytes Received/sec.)

Detail Level: Novice
Counter Type: PERF_COUNTER_BULK_COUNT

Bytes Transmitted/sec
Bytes Transmitted/sec is the rate at which bytes are leaving the Redirector to the network. It includes all application data as well as network protocol information (such as packet headers and the like.)

Detail Level: Advanced
Counter Type: PERF_COUNTER_BULK_COUNT

Packets Transmitted/sec
Packets Transmitted/sec is the rate at which the Redirector is sending packets (also called SMBs or Server Message Blocks). Network transmissions are divided into packets. The average number of bytes transmitted in a packet can be obtained by dividing Bytes Transmitted/sec by this counter.

Detail Level: Advanced
Counter Type: PERF_COUNTER_BULK_COUNT

Write Bytes Paging/sec
Write Bytes Paging/sec is the rate at which the Redirector is attempting to write bytes changed in the pages being used by applications. The program data changed by modules (such as programs and libraries) that were loaded over the network are 'paged out' when no longer needed. Other output pages come from the cache (see Write Bytes Cache/sec).

Detail Level: Expert
Counter Type: PERF_COUNTER_BULK_COUNT

Write Bytes Non-Paging/sec
Write Bytes Non-Paging/sec is the rate at which bytes are written by the Redirector in response to normal file outputs by an application when they are redirected to another computer. In addition to file requests this counter includes other methods of writing across the network such as Named Pipes and Transactions. This counter does not count network protocol information, just application data.

Detail Level: Expert
Counter Type: PERF_COUNTER_BULK_COUNT

Write Bytes Cache/sec
Write Bytes Cache/sec is the rate at which applications on your computer are writing to the file system cache using the Redirector. The data might not leave your computer immediately; it can be retained in the cache for further modification before being written to the network. This saves network traffic. Each write of a byte into the cache is counted here.

Detail Level: Expert
Counter Type: PERF_COUNTER_BULK_COUNT

Write Bytes Network/sec
Write Bytes Network/sec is the rate at which applications are writing data across the network. This occurs when the file system cache is, such as for named pipes or transactions, or else the cache writes the bytes to disk to make room for other data. Dividing this counter by Bytes Transmitted/sec will indicate the proportion of application data being written to the network (see Transmitted Bytes/sec.)

Detail Level: Novice
Counter Type: PERF_COUNTER_BULK_COUNT

File Read Operations/sec
File Read Operations/sec is the rate at which applications are asking the Redirector for data. Each call to a file system or similar Application Program Interface (API) call counts as one operation.

Detail Level: Novice
Counter Type: PERF_COUNTER_COUNTER

Read Operations Random/sec
Read Operations Random/sec counts the rate at which, on a file-by-file basis, reads are made that are not sequential. If a read is made using a particular file handle, and then is followed by another read that is not immediately the contiguous next byte, this counter is incremented by one.

Detail Level: Advanced
Counter Type: PERF_COUNTER_COUNTER

Read Packets/sec
Read Packets/sec is the rate at which read packets are being placed on the network. Each time a single packet is sent with a request to read data remotely, this counter is incremented by one.

Detail Level: Advanced
Counter Type: PERF_COUNTER_COUNTER

Reads Large/sec
Reads Large/sec is the rate at which reads over 2 times the server's negotiated buffer size are made by applications. Too many of these could place a strain on server resources. This counter is incremented once for each read. It does not count packets.

Detail Level: Expert
Counter Type: PERF_COUNTER_COUNTER

Read Packets Small/sec
Read Packets Small/sec is the rate at which reads less than one-fourth of the server's negotiated buffer size are made by applications. Too many of these could indicate a waste of buffers on the server. This counter is incremented once for each read. It does not count packets.

Detail Level: Expert
Counter Type: PERF_COUNTER_COUNTER

File Write Operations/sec
File Write Operations/sec is the rate at which applications are sending data to the Redirector. Each call to a file system or similar Application Program Interface (API) call counts as one operation.

Detail Level: Novice
Counter Type: PERF_COUNTER_COUNTER

Write Operations Random/sec
Write Operations Random/sec is the rate at which, on a file-by-file basis, writes are made that are not sequential. If a write is made using a particular file handle, and then is followed by another write that is not immediately the next contiguous byte, this counter is incremented by one.

Detail Level: Advanced
Counter Type: PERF_COUNTER_COUNTER

Write Packets/sec
Write Packets/sec is the rate at which writes are being sent to the network. Each time a single packet is sent with a request to write remote data, this counter is incremented by one.

Detail Level: Advanced
Counter Type: PERF_COUNTER_COUNTER

Writes Large/sec
Writes Large/sec is the rate at which writes are made by applications that are over 2 times the server's negotiated buffer size. Too many of these could place a strain on server resources. This counter is incremented once for each write: it counts writes, not packets.

Detail Level: Expert
Counter Type: PERF_COUNTER_COUNTER

Write Packets Small/sec
Write Packets Small/sec is the rate at which writes are made by applications that are less than one-fourth of the server's negotiated buffer size. Too many of these could indicate a waste of buffers on the server. This counter is incremented once for each write: it counts writes, not packets!

Detail Level: Expert
Counter Type: PERF_COUNTER_COUNTER

Reads Denied/sec
Reads Denied/sec is the rate at which the server is unable to accommodate requests for Raw Reads. When a read is much larger than the server's negotiated buffer size, the Redirector requests a Raw Read which, if granted, would permit the transfer of the data without lots of protocol overhead on each packet. To accomplish this the server must lock out other requests, so the request is denied if the server is really busy.

Detail Level: Advanced
Counter Type: PERF_COUNTER_COUNTER

Writes Denied/sec
Writes Denied/sec is the rate at which the server is unable to accommodate requests for Raw Writes. When a write is much larger than the server's negotiated buffer size, the Redirector requests a Raw Write which, if granted, would permit the transfer of the data without lots of protocol overhead on each packet. To accomplish this the server must lock out other requests, so the request is denied if the server is really busy.

Detail Level: Advanced
Counter Type: PERF_COUNTER_COUNTER

Network Errors/sec
Network Errors/sec counts serious unexpected errors that generally indicate the Redirector and one or more Servers are having serious communication difficulties. For example an SMB (Server Manager Block) protocol error will generate a Network Error. These result in an entry in the system Event Log, so look there for details.

Detail Level: Novice
Counter Type: PERF_COUNTER_COUNTER

Server Sessions
Server Sessions counts the total number of security objects the Redirector has managed. For example, a logon to a server followed by a network access to the same server will establish one connection, but two sessions.

Detail Level: Novice
Counter Type: PERF_COUNTER_RAWCOUNT

Server Reconnects
Server Reconnects counts the number of times your Redirector has had to reconnect to a server in order to complete a new active request. You can be disconnected by the Server if you remain inactive for too long. Locally even if all your remote files are closed, the Redirector will keep your connections intact for (nominally) ten minutes. Such inactive connections are called Dormant Connections. Reconnecting is expensive in time.