Apr 15, 2024 · A seek() operation moves that pointer to some other part of the file so you can read or write at that place. So, if you want to read the whole file but skip the first 20 bytes, open the file, seek(20) to move to where you want to start reading, then continue with reading the file.

Nov 7, 2012 · file.seek(offset[, whence]) Set the file’s current position, like stdio‘s fseek(). The whence argument is optional and defaults to os.SEEK_SET or 0 (absolute file positioning); other values are os.SEEK_CUR or 1 (seek relative to the current position) and os.SEEK_END or 2 (seek relative to the file’s end).

Oct 14, 2023 · Your parameters to seek are incorrect, seek takes 2 parameters, an offset (how many bytes) and whence which describes from where to seek (start:0, current:1, end:2). So what you need is: import io sessionRecord.seek(0, io.SEEK_END) Or: sessionRecord.seek(0, 2) # Py2 But you can avoid doing this by opening the file in append mode:

Sep 29, 2021 · seek changes the file postion but doesn't read anything. It wouldn't know in general how much to read. After the seek you can read 1 byte. As a side note, don't open with more rights than you need - no need to create an unnecessary failure point in your code.

However, this is only true for jumping to absolute offsets like Position = 0 and not relative offsets like Position += 0, in which case Seek seems slightly better. However, you should keep in mind that we are talking about performance of a handful of integer arithmetics and if checks, that's like not even accurately measureable with ...

Jul 25, 2013 · In node.js the seek functionality is included in the read function. When you use the fs.read function, there is a parameter called position, that works as the seek position. If what you want is to write to the file, the function fs.write also has the position parameter.

Feb 27, 2012 · Index Seek. When SQL Server does a seek it knows where in the index that the data is going to be, so it loads up the index from disk, goes directly to the part of the index that it needs and reads to where the data that it needs ends.

Jan 20, 2017 · The (average) seek time is the time taken to switch to that position to any other position, with both (a) track and (b) sector. When positioned, the read can start. The disk RPM is into play for this, if it spins at 600rpm and has 100 sectors per track, it means that it …

Dec 29, 2009 · A clustered index range seek that returns 138 rows is not your problem. Technically you can improve the seek performance by making the clustered index narrower: evict all varlenght into a separate allocation unit by setting 'large value types out of row' to 1 and recreating the table from scratch). enable page compression (SQL 2008 EE only).

Mar 1, 2016 · That happens because you must set the controlling index before calling Seek... With rstTemp ' Store current record location. theBookmark = .Bookmark ' Set the index. .Index = "PrimaryKey" '<- use your index name here .Seek "=", intSeek If you need to list the names of your table's indexes, you can examine its TableDef.Indexes collection. Here ...