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http://infocenter.sybase.com/help/topic/com.sybase.infocenter.dc31654.1570/html/sag1/sag1474.htm
Using directio to bypass operating system buffer. The directio parameter for disk init, disk reinit, and sp_deviceattr allows you to configure Adaptive Server to transfer data directly to disk, bypassing the operating system buffer cache.directio performs I/O in the same manner as raw devices and provides the same performance benefit as raw devices, but has the ease of use and manageability of ...
https://apps.support.sap.com/sap/support/knowledge/preview/en/2044861
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http://sybase.public.ase.administration.narkive.com/dxpj3ahl/directio
file in DIRECTIO_ON mode, error: (25) Inappropriate ioctl for device. 01:00000:00013:2009/11/08 13:58:56.45 kernel The device does not support directio. '/sybtmp04/gi_datadsk1.dat' will be activated using dsync instead of directio.
http://infocenter.sybase.com/help/topic/com.sybase.infocenter.dc36272.1572/html/commands/X64061.htm
If you issue disk init with the directio parameter on a platform on which it is not supported, Adaptive Server issues the message No such parameter: 'directio'. Use disk init for each new database device. Each time disk init is issued, a row is added to master..sysdevices. A new database device does not automatically become part of the pool of ...
https://answers.sap.com/questions/11383462/dsync-and-directio-of-sybase-devices.html
DIRECTIO means that the FS cache is bypassed and the contents are written to disk directly. DIRECTIO provides much better write performance than DSYNC and you always want to make sure you use DIRECTIO for database devices in the file system. For master ASE always uses DSYNC and thats not …
https://github.com/axboe/fio/issues/136
Dec 24, 2015 · ZFS doesn't support Direct IO so the issue you are seeing is a file system limitation and not an issue with FIO. Hope that helps.
https://apps.support.sap.com/sap/support/knowledge/preview/en/2038258
Attempt to set tmpfs file '/sybtmpfs/tempdb2_dat1' to Direct i/o mode failed, error: Inappropriate ioctl for device The device does not support directio. '/sybtmpfs/tempdb2_dat1' will be activated using dsync instead of directio. Initializing virtual device X, '/sybtmpfs/tempdb2_dat1' with dsync 'on'. Virtual device X started using asynchronous ...
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=369066738
Mar 15, 2014 · The database has been marked as suspect. 9008 16 Attempt to open device '%.*s' failed. When opening a device which does not support 'directio' with 'dsync' explicitly set to FALSE, 'directio' needs to be explicitly set to FALSE too.
https://stackoverflow.com/questions/14344799/java-nio-no-such-device-exception-on-linux-but-works-when-using-fileutils
Java NIO “No such device” Exception on linux but works when using FileUtils. Ask Question Asked 6 ... this exception is thrown when "the underlying file system of the specified file does not support memory-mapping." How are you mounting the filesystem on Linux? ... Also check if the /etc/fstab file does not specify directio for your share ...
https://stackoverflow.com/questions/53668643/upos-opos-directio-scanner-remote-triggering-datalogic-heron-hd3430-posfor-net
How i can trigger a scanner remotely form my application ? the DirectIO commands provided with device does not contain any command could do that and with some search over google i found my device actually supports this kind of commands but i didn't find any find any thing useful. Note 1:i am open to any suggestion could help.
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