When I did it (which about 12 years ago) I started with the postscript driver sample, replaced all the postscript-specific stuff (in my case, to write to a bitmap instead of generating postscript commands). I also wrote a custom print monitor (the driver writes to the spooler, which write to a monitor): my monitor wrote … Read more
The problem was that windows does not recognize the device driver, therefore is needed install it manually. The way I solved this: 1. Open Device Manager and locate your device under “Other devices”. 2. Right click on your device and then click on “Update driver software”. 3. Now click on “Browse my computer for driver … Read more
assuming that a worker wants to send 4G of data to the driver, then having spark.driver.maxResultSize=1G, will cause the worker to send 4 messages (instead of 1 with unlimited spark.driver.maxResultSize). No. If estimated size of the data is larger than maxResultSize given job will be aborted. The goal here is to protect your application from … Read more
You can use sudo apt-get install php7-mysql or sudo apt-get install php5-mysql or sudo apt-get install php-mysql This worked for me.
I’m a little unclear on differences between DMA and interrupt I/O Differences between DMA and interrupts are bogus because they are not opposing concepts. DMA and interrupts are orthogonal concepts, and both concepts are typically used together. The alternative to DMA is programmed I/O, aka PIO. The alternative to interrupts is polling. Interrupt-driven You need … Read more
You can find some good examples in kernel itself. Take a look at next files: drivers/rtc/dev.c, drivers/rtc/interface.c kernel/printk/printk.c drivers/char/random.c To add poll() function to your code follow next steps. Include needed headers: #include <linux/wait.h> #include <linux/poll.h> Declare waitqueue variable: static DECLARE_WAIT_QUEUE_HEAD(fortune_wait); Add fortune_poll() function and add it (as .poll callback) to your file operations structure: … Read more
Linux x86 ring usage overview Understanding how rings are used in Linux will give you a good idea of what they are designed for. In x86 protected mode, the CPU is always in one of 4 rings. The Linux kernel only uses 0 and 3: 0 for kernel 3 for users This is the most … Read more
I found the accepted solution didn’t work, however this slight change did: from selenium import webdriver chrome_options = webdriver.ChromeOptions() prefs = {‘download.default_directory’ : ‘/path/to/dir’} chrome_options.add_experimental_option(‘prefs’, prefs) driver = webdriver.Chrome(chrome_options=chrome_options)
Your URL should be jdbc:sqlserver://server:port;DatabaseName=dbname and Class name should be like com.microsoft.sqlserver.jdbc.SQLServerDriver Use MicrosoftSQL Server JDBC Driver 2.0