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https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.1.0/com.ibm.zos.v2r1.idad400/blksz.htm
If the records are format-V, you must specify the maximum block size. If format-V records are unblocked, the block size must be 4 bytes greater than the record length (LRECL). If you do not use the large block interface (LBI), the maximum block size is 32␠760 except for ISO/ANSI Version 3 records, where the maximum block size is 2048.
https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.1.0/com.ibm.zos.v2r1.idad400/lbi99999.htm
The large block interface (LBI) lets your program handle much larger blocks with BSAM or QSAM. On the current level of the system you can use LBI with BSAM, BPAM, and QSAM for any kind of data set except unit record or a TSO/E terminal.
http://www.dba-oracle.com/t_large_blocksize.htm
Kevin Loney also recommends large Oracle blocksizes except in high-DML conditions: " There is only one reason not to use the largest block size available in your environment for a new database: if you cannot support a greater number of users performing updates and inserts against a single block. Other than that, increasing the database block ...
https://blogs.vmware.com/kb/2012/10/large-io-block-size-operations-show-high-latency-on-windows-2008.html
Oct 04, 2012 · This issue can also be reproduced in a Linux VM with the ‘dd’ command and issuing commands with a large block size (ie: 1M). The reason why high latency is observed is due to the fact that the large I/O block size needs to be split up into smaller …
http://lkml.iu.edu/hypermail/linux/kernel/0710.0/0362.html
Support large blocksize up to PAGESIZE (max 64KB) for ext3 From: Takashi Sato <sho@xxxxxxxxxxxxxx> This patch set supports large block size(>4k, <=64k) in ext3 just enlarging the block size limit. But it is NOT possible to have 64kB blocksize on ext3 without some changes to the directory handling code.
http://lkml.iu.edu/hypermail/linux/kernel/0709.1/1117.html
> apparently large block support as it is solves world peace. Is that > accurate? Heh. It's hard to say. I think fsblock could take a while to implement, regardless of high order pages or not. I actually would like to be able to pass down a mandate to say higher order pagecache will never
https://asktom.oracle.com/pls/apex/asktom.search?tag=oracle-block-size
Jan 17, 2013 · Hi Tom, I would be very grateful if you could share your thoughts on Oracle block size. "rule of thumb" is Oracle Database block sizes (2 KB or 4 KB) for online transaction processing (OLTP) or mixed workload environments and larger block sizes (8 KB, 16 KB, or 32 KB) for decision support system (DSS) workload environments
http://www.dba-oracle.com/s_oracle_block_size.htm
- Permits reading several rows into the buffer cache with a single I/O (depending on row size and block size). - Good for sequential access or very large rows (such as LOB data). Block Size Disadvantages Smaller blocksize: - Has relatively large space overhead due to metadata (that is, block header). - Not recommended for large rows.
https://support.microsoft.com/en-us/help/2510009/microsoft-support-policy-for-4k-sector-hard-drives-in-windows
Nov 12, 2019 · This article describes the current Microsoft support policy for these new drive types on Windows operating systems. Applications and hardware devices may have reliability and performance issues when they are connected to these new kinds of drives. Contact your application and hardware vendors about their support policies for these new drive types.
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